How would Microsoft destroy win32 platform?

Sweeney thinks Microsoft will make Steam “progressively worse”

This is About http://www.pcgamer.com/-sweeney-thinks-microsoft-will-make-steam-progressively-worse-with-windows-10-patches/

I don’t know if this is a duplicate. But my question is, how exactly can microsoft destroy win32 protocol within windows10, cause win10 comes with win32 full features right? just like windows 7 or xp.

So how exactly can they ‘phase out’ win32 within windows 10 and force all of us to windows store only? Did Boss read some leaked info about Microsoft that we didn’t read yet? Gotta wait for Microsoft wikileaks :stuck_out_tongue: .
Or he was just talking about future Windows releases where Microsoft actually will be able to remove win32 altogether, if they want to do that. I am asking this because the information that I have says Microsoft can’t just remove win32 support within current build of windows, that’s not possible. But I will admit I am not an expert.