- the dpad : Intellivision had it first, there were also a few other random things that had one, NES had a better one and PS1-4 has the best one though
- the flip button : No clue what this is
- start and select : Nintendo was first to call it start but plenty of earlier controllers had center "menu"/etc buttons
- analog stick : Sega did it first, they had thumbstick controllers for everything mega-drive and up.
- rumble : nintendo did have the first small controller one, but there were plenty of flightsticks that had it already.
- touchscreen : sega made a color touch handheld in the early 90's, but canceled it before launch due to it being too expensive, there were tons of touchscreen games for the iPaq's (not an apple product) though, but yeah touchscreen gaming sucked and didnt take off till the ds...oh wait, it still sucks...fuck touchscreens.
Nintendo doesn't really innovate, they just toss together things everyone else already has done as soon as they start to get cheaper and more popular then ride the hype train all the way to the bank. Not saying there's anything wrong with that either, i mean, waiting to do a color handheld gave us the FANTASTIC GBA, just now that we're beyond the more practical innovations they're still doing the same thing, building on whatever is starting to be hype and dropping in price, and it's leading to some pretty hard to use game systems...