And also, talk to game developers about what they currently have, what problems they have to work around, and what they would like to have. Don't just look at things such as "virtualised textures", "cache control for data streaming", "z-buffer access", but also what languages to program in, if there's an OS to work with (or around), support, compilers, toolkits, the works. It's not just about the hardware, but software support too.
No announcement yet.
The Ideal (Hypothetical) Gaming Processor