^^
Well, no offence to the great N device, but watching Avatar on a 3DS screen won't exactly be like watching it on a big screen. Hands-on reports of 3D movies on the 3DS have said that the effect is there, but really muted.
And sadly the auto-stereoscopic tech used in the 3DS can't work on a big screen with multiple viewers.
Bottomline, we're still waiting for a real glass-free solution to experience 3D cinema properly.