If Nintendo uses a type of checkerboard rendering (NVidia's version of it anyway) I mean they could very well get something like
Rendering a 600p image, gives them 720p in portable mode
Rendering a 720p image in dock mode gives them a 900p image in docked mode
Rendering a 900p image in dock mode gives them a 1080p image in docked mode
That wouldn't be bad at all.







