It really depends on type of game you're playing. With racing and fighting games then Wii is the obvious choice but for puzzle games and 2D platforming, DS works better. And FPS works great for both (Why haven't developers made more FPS's for the DS )
motion sensor as well, ds is alrite but wii is so cool! both of them combined wood be even better! lol
isn't this more a poll of wii vs. ds? because a touch screen would not work whatsoever on console games like the wii. you'd have to get up to do anything. motion sensing would work on the ds, though. since you couldn't use both functions interchangeably, you can't exactly compare them
Motion sensor....besides almost all of the DS games don't have touch screen controlls....the only bad thing is the online play of the wii(I haven't tried it yet....but they say is bad)