Now this is interesting, because a friend (reviewer) playing with the new Sigma SD1 is saying that the only thing which betters it is a 40MP+ medium format, and that nothing in 35mm comes close, in fact it makes them look 'Soft & two dimensional'.
Having looked at the patent his comment is that with the R & D resources of Canon, they could take this to a new generation and that Bayer matrix sensors could follow polaroid into history.
The politics of this Patent are very interesting, Canon would not announce this unless they were either close to releasing it in a real camera, or that they were doing it to wrong foot the competition, I can't imagine they would spend the R & D to reach a Patent stage without an intention to launch a product.
They only qualm I have about a camera of this type, and that is the cost. Sigmas latest caused a few sharp intakes of breath, similar to a 1Ds I wonder if Canons first offering will be any cheaper.