Re: MS next... again
Whether they can do that at all would depend on what they consider a "market". Are desktop PCs/laptops a market unto themselves, or are they lumped in with tablets and smartphones as part of a larger market.
Hint: how much time does the average person spend accessing the internet, apps, games etc. on a smartphone versus on a laptop/desktop PC in 2018?
I think the market has taken care of Microsoft's dominance. For instance, even if they only allowed Edge as a browser on Windows - you couldn't even install Chrome/Firefox - they couldn't use that to influence web standards because there are more Android & iOS devices in active use on the internet than there are Windows PCs.