During E3 2016, Microsoft took to the stage to announce its "Play Anywhere" initiative. This new program would see games being released simultaneously on PC and Xbox One with crossplay enabled. One purchase (most of the time) would grant you access to both versions and you wouldn't need to worry about restarting your progress as save files would transfer over. While there aren't that many titles available with "Play Anywhere" (this Wiki page lists 57), Marvel vs. Capcom: Infinite is suddenly now a part of the program.
Popping up on the Windows store out of the blue, the crossover fighting game is currently available for $39.99 with the entire host of DLC ready to go. A deluxe version is also available for $59.99 and includes the character pass DLC. If you purchased this game digitally on Xbox One, you should already have the PC version (along with any DLC), but anyone who was waiting (for some reason) should know that this version is Windows 10 exclusive. It will also be a UWP (Universal Windows Platform) app, so that might bring performance problems or installation oddities.
I have very limited experience with newer UWP apps, but both Forza 7 and Age of Empires: Definitive Edition run perfectly fine. I would imagine this does, too, as the previous PC version was solid.
Marvel vs. Capcom: Infinite gets Xbox Play Anywhere support [Windows Central]
via destructoid https://www.destructoid.com/marvel-vs-capcom-infinite-joins-microsoft-s-play-anywhere-initiative-491786.phtml