Would it be much difficult making shaders able to sample what's on top of it?
It could allow shaders like godrays etc. Since I do create a lot of shaders it would be pretty cool to have this capability.
Having HDR support would be nice as well, and I don't mean like TV HDR, but the capability of having values working properly above 1.0 on effects and stuff.
(In a way a shader could see this HDR color and be able to control it without losing color data)