> we need to wait until microsoft tries to squeeze Steam out of windows.

Steam Machines were a direct result of that: Microsoft announced plans to block non-Microsoft app stores on Windows 8. This was a credible existential threat to Valve, which got off to a rocky start, and they wisely persisted despite Windows 8 (and yhe threat) flopping. Microsoft os no longer in a position to try and squeeze Steam, thanks to Valve's diligence, and Microsoft going half-cocked the first time.