https://www.gamespot.com/articles/three-more-xbox-360-games-are-getting-enhanced-for/1100-6454724/

In addition to Xbox One games, a limited number of Xbox 360 titles will look better on Xbox One X. After announcing four Xbox 360 titles that will be enhanced on Xbox One X back in October, Microsoft today confirmed three more--and they are some good ones.

Skate 3, Mirror's Edge, and Gears of War 3 are joining Assassin's Creed, The Elder Scrolls IV: Oblivion, Fallout 3, and Halo 3. So there will be a total of seven backwards-compatible titles. It's not immediately clear if the three newly confirmed titles will be enhanced on Xbox One X from the start or if that will happen later. We also don't know the specifics about how they are being enhanced for the new console.