I've tried the thing on iTouch 3G, though impressive, it should be noted that it has some issues such as random hiccups from time to time, overheating in mere minutes though it seemingly doesn't affect the hardware, low resolution textures compared to superior iPhone 4 version and understandably low battery life. And I'm not sure if 4G version is offering meaningful upgrade aside from far better screen resolution. Essentially you need an iPhone 4 for this thing to run properly.
I do hope that 3DS will handle this kind of graphics easily but on more comfortable level, i.e. no overheating, 8 hours of battery life, stable 60 fps, stereoscopy - and all these for a price tag of $200-250. Of course it will come at a price of lower screen resolution compared to games on 4G devices and lower resolution textures compared to high-end games on iPhone 4, but the latter isn't surprising considering the cost of $500-700.
