I think they have finally realized that selling games on their own, buggy, slow and unpopular Windows Store is a really bad idea. They have changed their mind and said that they will be selling their PC games on Steam, maybe including those titles that have Xbox Play Anywhere (buy once on console, play on PC too) thing?
Phil Spencer, head of the Xbox team at Microsoft, was talking on GameSpot stream during the E3. He said:
“I don’t think Valve’s hurt by not having Microsoft’s first-party games in their store right now. They’re doing incredibly well.”
Accordingly, Spencer said that Microsoft:
“Microsoft will ship games on Steam again.”
I don’t know about you guys but I would be more than happy to play Gears of War 4 in coop with friends on Steam! The employee did not say which games would be sold on Steam, nor when they would appear.