Imo i dont think its possible. however.... it depends on 3D. will people use it. i mean any game can be played without 3D right. a lot of people might not use it if:
it affects the eyes, like giving you eye strain or dryness, making it irritating for you.
if it casues some form of nausia, what i mean is that the 3DS is a protable device - is it really sensible to be using the 3D tech in the car, or not the train, plane, when your already in motion. does it work well in that environment?
how good is the 3D. is it ambigious, or is it crystal clear visuals. does the game blur for something like racing games? is 3D suited to high speed games, etc does it actully make the gameplay more fluid or just impair your ability to play.
so while i think the NPG might be excellent at what it does, i dont see anything beating 3DS, unless 3D isnt that good anyway... which i'm leaning towards anyway, because i think 3D is probabily better for just watching a movie or something, not really for games.
