LightHeaven
Regular
Uh? It not supported as a Framework to develop Metro Style apps and that is all. XNA apps/Games are fully functional in Windows 8. Pin the XNA app's tile to the start screen and the average Joe won't see a difference.
There will be a large difference: App Store. Xna games could be first class citizens in windows for the first time, but they are still being pushed back into irrelevance on windows platform due this.
It's not much of a problem if Ms ditches the XNA, but provide a similar concept and apis in winRT, but so far Ms response has been: "Well, you just have to use c++/directX directly if you want to develop metro games on win8". which is really a boomer after all that: We need to democratize gaming, and bring more people to the industry" they've bragging for years now...
Specially now that would be probably the biggest move Ms could make to help improve a crucial area for indie games: Provide a store to sell those games without the need of a publisher.