Microsoft is reportedly considering buying EA, PUBG Corp and Valve
theinquirer.net
theinquirer.net
Steam - Can't see a sale going through. Valve makes an absurd amount of money doing relatively little. It's basically Gaben's personal playground. Valve doesn't have the expertise to fix up the windows app store (which is an ecosystem problem). Steam was bootstrapped by HL2, not with exclusive partners. Valve has been doing some great work in VR (knuckles controllers, etc) that could be useful for Microsofts VR offerings, but it seems they basically give that away for free (or subsidised by all the games that use it being sold on steam).
PUBG Corp - Complete waste of time. Player Unknown made a game that is ridiculously fun, but is still buggy and poorly optimised. Unlike Minecraft there isn't an educational/mod play either.
A Steam-exclusive title nevertheless though.
I imagine people would go where the games are. If Valve Linux can only play, say, 80% of games that Windows can, then they'd pick Windows.