I'd love to see this in the Prime, and mainly for the megapixel count. I know the MP is only a fraction of the equation but I'm willing to bet that the rest of the equation is 'next gen' as well and will probably take amazing pictures, specially if it has the backlit CCD sensor edizzle stated.
But the main reason I'd like to see this in the Prime is for marketing. The Prime is slated to go mono-e-mono with the iPhone 5, and this battle is going to come down to much more than android vs apple, fanboy vs fanboy. It's going to be a marketing battle and having a camera with TWICE the MP of the iPhone will be something that will grab the attention of the mass market.