That's the thing you won't need new HW with DX12 form modern GPU/CPU... Unlike past versions... They've said it in the presentation... So that argument that was valid for 10 and 11.X is obsolete in that case...
about steam OS and Linux it reminds me my computer science teacher in high school in the 90s saying Linux will be dominating soon... We are still waiting... Actually market shares went down lately... And as a deterrent last time I checked (les than 2 months ago) windows version older than XP had more market shares still than Linux...
so even if by some magic trick every PC gamers were to switch to steam OS it would sill ne dwarfed by MS OSs and even apple...
and I have nothing against Linux or freeBSD I have run them on many aging rigs in the past... Bit I hardly see how it could take off without major support from OEMs and better driver implementation from the private sector outside of the community and I don't see it change for gaming either... They simply don't have the resources and the coordination major corporation have.... Heck without MS opening some of the code it would have even less market share today imo...
