What next after the megapixel wars?

This post goes in a different direction but I like where it begins:

Akira Watanabe, head of Olympus’ SLR planning department, said that 12 megapixels is plenty for most photography purposes and that his company will henceforth be focusing on improving colour accuracy and low-light performance.

A quotation from the interview with Watanabe may be found here.