[shuzchen]

Be careful not to think of megapixel count as the end-all of photo quality. While it is very important, the quality of the image sensor makes the biggest difference. You can buy some 16MP point and shoot, but the image quality isn't going to match a quality DLSR at 10MP (like the Nikon D80). Think of megapixel count as just the upper limit of image quality.

[objclxt]

I think the post you're replying to is referring to applying this technology to video. For feature films, 4K resolution would be highly desirable, and that's going to need some very large sensors.

[Daniel_Newby]

Or several smaller sensors and fancier software.