@JEMC
Looks like you are mostly right about those rumors, however, I'm still thinking that HBM1 should fit well into laptop form factors, basically where it makes the most sense. So perhaps all mobile variants could be using it going forward.
http://wccftech.com/amd-polaris-10-polaris-11-launch-event/
AMD confirmed that Polaris 10 is aimed at both mainstream desktop products and high-end notebook products which means that this chip is quite fast. The Polaris 10 could be similar to NVIDIA’s GM204 which serves both, a high-end mobility lineup and the mainstream desktop lineup while staying competitive in terms of performance and efficiency.
edit: It would be funny if AMD came out and said something like, "Hey, check out our new mid-range cards at 399 bucks a piece, oh and by the way, the absolute perf is 4/5 of a NV1080 and about same if not better perf/watt too"
-M
