J, J, J...you really need to check your facts before posting...FPS's have been around for a very long time, longer than most people realize...the first really being, Wolfenstein, then onto Doom and Duke Nuke'em, all of which started on PC's...Goldeneye, while it was acclaimed, and pretty decent, it wasn't the first
MMORPG's aren't necessarily doing all that well, WOW is the only one that you pay for that is getting any kind of real play...most of the others have their runs for a while, and then just drop off, with maybe 10% of the playing populace continuing to play after the inital run...video game companies are going where the money is mostly, that's why you have so many games these days trying to incorporate some kind of online competition...NFS:HP, MvC3, any sports franchise series, Dynasty Warriors...it's not really a matter of a lack of creativity and ingenuity for FPS's, because there are quite a few of them with involved stories and there are some even with a creative way to play an FPS (like the new Bulletstorm), it's more of a matter of gamers requesting such games like side-scrolling beat em' up fighters and platformers
Outside of the music sim genre, FPS games are one of the more recent genres of games that have been added to the video gaming industry...platformers have been around forever, beat em' ups have been around for quite a while too...there are very few, if any, that come up with something new and innovative to bring in new gamers or bring old gamers back to that genre...the majority of the gaming populace want one, some, or all these 3 things in their games: online gameplay, replay value,
and excitement in the form of new and innovative gameplay
As for other companies taking a note from Nintendo...Nintendo didn't even actually make all those games: Pokemon (while licensed, created by Game Freak), Tetris (another licensed by Nintendo, but not actually created by)...Zelda and Mario are definitely there's though...and while the Wii was very innovative and picked up a number of new "gamers", the more serious gamers (like myself) don't really take the Wii seriously...and the biggest reason that it was able to pick up on sales on the other two systems of the same generation was pricing
Music...*sigh*, there are alot of games with good music or awesome music, most games these days are even going as far as having musical scores and composition created just for the games themselves, or getting known artists and musicians to contribute music to the games themselves
Here's a question: outside of Goldeneye, how many FPS have you actually played? I mean, I'm not a big fan of the genre myself, but I do give it respect, because it has created some pretty good games out there, and other games that have spun off from the genre: Halo series (while I hate, I will admit it has a pretty decent story), Resistance series, Unreal series, Bulletstorm, Killzone series, Gears of War series, Mirror's Edge (spin-off)...and those are just the recent ones, there are still others that I failed to mention...and yes, there are alot of FPS's based off actual combat of today where the plot campaign sux gorilla nutz, but they are focused more on the online play than the campaign...you asked what do FPS's have, they have gamers wanting to play them, and 3-D graphics (something many gamers want)
I'll conclude with this...video game companies are definitely bandwagoners when it comes to video game genres, however, they have to be...otherwise, they would go belly-up trying to make games that may or may not catch on...for example; Capcom, while being one of the best known names in video game development, hasn't actually had a really good title for a pretty long while before MvC3; sure, the Devil May Cry series and Okami got known, but neither really pick up as much as they would've hoped...Namco pretty much seems as though it's run out of ideas...the Ridge Racer series has all but faded into obscurity for titles like: Gran Turismo (realism and graphics), Need for Speed (well known), and Midnight Club (innovative customizing of vehicles)...Tekken is still trying to hang in there, but the fighting game genre is starting to fade a bit a well...there is plenty of ingenuity and creativity in games today, and while there are alot of FPS games out there...it still doesn't compete with the amount of games that tanked that were side-scrolling platformers and beat em' ups...the days of: Streets of Rage, Final Fight, Double Dragon, and Bad Dudes are over...the majority of gamers are tired of the 2-D scrolling, and trying to throw 3-D graphics onto a 2-D scrolling map just doesn't cut it with today's gamer, that only works for fighting games, and even then unless there is some kind of online gameplay involved, that doesn't cut it anymore either...you do have some games that kind of give you the feel of the "side-scrolling beat em' ups" though: Assassin's Creed, Shenmue, Dynasty Warriors, Sengoku, Batman: Arkham series, Star Wars:Force Unleashed series...there are tons of other games out there, they just don't get the advertising that other games, like FPS's, do. Gaming companies are always trying to go for what the gamers are asking for, and right now, gamers are asking for online gameplay with or against other gamers, because not only will that add replay value, it will also mean the game doesn't really go the same way as it did before...that is harder to account for with certain genres...there really hasn't been an increase on the FPS genre, it's just that now more of them are starting to get the spotlight comparitvely to other games in other genres