It just struck me that if the screen is only 6" theres no reason why there won't a traditional clamshell variant of the system some point down the road, maybe even on day one. The main concern with size is that the rumoured specs can't be housed in a small shell, but a 6" screen can just about fit on the 3DS XL. If the specs can fit in a 7" tablet form factor without overheating, they could fit inside a similar shell to the 3DS XL.