Microsoft doesn’t have much in terms of games on their App store, but if anyone is contemplating buying either their version or the Steam version it’s pretty much a no brainer.
You can buy Rise of the Tomb Raider from Steam, or you can buy it from Microsoft. The price is the same, but as How-To Geek recently explained, the games themselves are not. The Windows Store version does not allow vsync to be disabled, and it always runs in “borderless fullscreen” mode, which can potentially limit performance. Even more problematic, because Microsoft Store games are built on the new “Universal Windows Platform” rather than as conventional executable files, modding isn’t possible, nor can it be added to your Steam library, which means you can’t play it with the Steam controller.
Not that I would have much of a reason to mod a Tomb Raider game (since most of them don’t offer much other than graphical changes if even that), nor would I want to buy anything from Microsoft’s store. As far as I’m concerned Microsoft turned a blind eye to PC Gaming a long time ago. I’m sure they’re still kicking themselves for not taking Gabe’s idea for Steam back when it was just a concept.