Chozo-Ghost and Kytim I just can't accept that. I believe it was Miyamoto who said something along the lines that he wishes that people didn't have to sit in front of their TVs to play games, but to completely combine the handheld and home console devices into one just seems like such a bad move. I would think Nintendo would want both to feel very differently, and unless that's one big honkin piece of hardware to carry around the control input will almost always be different from a handheld to a home console, at least judging by how Nintendo is doing things lately.
Motion is here to stay for Nintendo wether you like it or not, and unless we can have our tiny little screens propped up several feet away from us as we swing our arms to Wii Sports 2020 while waiting at the bus stop, it just ain't gonna happen. There will be different experiences from playing games on your TV than on your hand held on go. It used to be they were exactly the same except for raw power, but those days are over, well unless you only play PSP of course.
I am basically saying, developers have not and will not, for a super duper long time be able to recreate the experiences we have on the TV into our handhelds and vice versa control wise. Natal, and Move will not work on our typical sized handhelds of today, unless we start carrying Ipad sized devices everywhere with reasonable amount of room in front of the player. And even when we will be able to start touching our TVs with touch sensitive screens you can bet very few games will be made with the feature before they are all just canceled all together.