Microsoft dropped Xbox One X enhancements for four additional Xbox 360 games yesterday. These are CD Projekt RED's The Witcher 2 (2012), Lionhead's Fable Anniversary (2014), Realtime Worlds' Crackdown (2007) and Turn 10's Forza Horizon (2012).
ResetEra user Hardvlade managed to post comparisons for the first three titles when running in the brand new Performance Mode, which keeps the graphics as it was on the Xbox 360 while improving and stabilizing the frame rate, and the Graphics Mode which bumps resolution up to 9x on the Xbox One X while improving texture details and anisotropic filtering. The results speak for themselves - these almost look like current generation games now. Granted, The Witcher 2 and Fable Anniversary are also available on PC which makes the enhancements a little less impressive, but Crackdown isn't and this is the best version we've ever seen of the game.
The Witcher 2
Here's a Forza Horizon comparison, courtesy of ResetEra user peepers. This one is less impressive simply because the screenshots were scaled down from 4K to 1080P by imgur.
Finally, a bonus The Witcher 2 comparison posted on XboxDVR by Xbox Live user chinohormann.
The total number of Xbox One X enhanced Xbox 360 games is now eleven as Skate 3, The Elder Scrolls IV: Oblivion, Fallout 3, Gears of War 3, Halo 3, Mirror's Edge and Assassin's Creed already got the treatment.
Let's hope Microsoft can do the same with Rockstar's Red Dead Redemption before the sequel drops later this Fall.