CG writes: We have just posted our Assassins Creed Odyssey 4K gameplay video which takes a look at the early part of the game on Xbox One X. Ubisoft has certainly produced a very nice looking game but there are some issues with performance. That said, this is a pre-release version and perhaps they will update to get better results.
Source: N4G PC Assassin's Creed Odyssey 4K Gameplay Impressions XB1X – CG