Xbox mistakenly reveals Steam tab in new UI mockup - TrueAchievements

[News]

1. Xbox mistakenly reveals Steam tab in new UI mockup TrueAchievements
2. Here’s the Steam on Xbox evidence Microsoft didn’t want you to see The Verge
3. Cat’s Out of the Box: Microsoft Accidentally Reveals Steam Games May Be Coming to Your Xbox Console VICE
4. Is Xbox getting Steam integration?! Windows Central
5. Is Steam coming to Xbox? Polygon