The biggest advance in technology will be the ever-so-popular Brain Chip, from now on referred to as iChip in this post. The iChip will be implanted in the brain and will function as everything, and everything will be activated through thought, or at least, through certain actions within the brain. Don't worry, your brain will learn them quite easily, through a trial and error principle. A happiness regulator (possibly with limitations, so this does not become a drug) will let people decide their mood. You'll be able to download knowledge on there in later versions, which will not make school obsolete, but which will change the use of school from a place where you gather knowledge to a place where you learn skills, social interaction, meet people, stuff.
The iChip also means interaction with everyone all over the world without even saying a word, just sending thoughts. Don't worry, you'll get used to it, it'll be like cellphones/internet, only better, user-friendlier, more natural, and without doing anything.
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No teleporters, sorry. Hoovercars? Probably, yes. Depends on our new source of energy.