Well, the chief advantage is that Microsoft can force its practical monopoly on gaming OSs to run Steam and GOG out of business. Then again, Valve has built up enough cash that they probably could make SteamOS into a serious contender, with a free office suite that actually had a UI that made sense.* In short, they've continually done wrong by gamers to the degree that, if they make a serious effort to move from "Windows DXnn -- Required for serious gaming" to "Windows UWP App store -- Required for PC gaming", then those who've made piles of cash from gamers will realize that they have to adapt or die, and to adapt, all they need is to produce a decent office suite and let Adobe do their thing. And Microsoft has been dropping the ball for so long, it'll be a cakewalk.
*Consider the instructions to turn off the autoformatting that continually screws up your text in Word: Click on the File Pane, in the column ont he left, click on the Options icon-button. In the window that pops up, select in the left+colum the "Proofing" option (note: this is not the same as the "Proofing" field on the review Pane). Under the field "AutoCorrect" Options, press the button labeled "AutoCorrect Options". This will bring up a (Word XP, if not 6.0) dialogue. Click on the tab "AutoFormat As You Type" and de-select everything. In short, to make the program work for most of us, you need to navigate through the thirty-year history of the program, and every single UI change they made. Well, that's not entirely true. Thank God those variable drop-menus were dumped. But that just goes to show that Microsoft's cash cow has been vulnerable to a revolution for a long time, as Office has been the inefficient "Only Choice in Town". On the other hand, MS has never been good at the gaming market, simply because they can't overcome their B2B mentality and adopt one of fanatics.