"Beyond that, current technologies don't feasibly support the idea of a new console. High-definition 1080p is as good as it gets. It's just not possible to make games look any better yet. The Wii U ran straight into this complaint, and that's why it's a catch-up machine, not a quantum leap. It's really the best Nintendo -- or anyone -- can do at the moment."
I'm so sick of statements like that. PCs run HD resolutions since the 90s. Does that mean games don't look better now than Q3 Arena did in 1600x1200?
It just doesn't make any sense to measure image quality in pixels.
There are so many areas in which the graphics could be improved A LOT before even thinking about increasing the resolution further.
Framerate, tearing, draw distance, texture size, texture quality, number of polygons, proper use of image enhancers like AF or AA, lighting, modern shaders,...
SO much room for improvements.