Windows 10S will be a closed platform?

Hmmmm most of you made fair points. But I wonder, Apple and Google monopolize the market with their “closed” stores. And it’s working amazingly well for them. Is Microsoft the only one that can’t do the same? Because if they are leaning in that direction, it’s because they have a vision in which this might just work.

Xbox PC Store is concurring directly with steam, and losing miserably. Steam also wants to steal console market with Steam Link and all the hardware. So… Why would Microsoft just stand still?