Just Cause 4 had a 1080p to 2160p scaler on Xbox One X, and it spends a good chunk of time running closer to 1440p than 2160p, so you should see a big resolution improvement on Series X, as well as a stable 30 fps (drops below 30 fps occasionally on XB1 X).
Witcher 3 has both a dynamic resolution scaler and an unlocked framerate in performance mode, and it ran between 1080p and 1332p on Xbox One X, with framerate between 40-50 fps, so you should see a subtantial resolution and framerate improvement playing Witcher 3 in performance mode on Series X. However, since Witcher 3 is being Series X optimized next year, you're better off waiting for the optimization to play it on Series X.
Yeah definitely waiting for Witcher 3 Series X version.
But thanks for reminding me about Just Cause. I own JC3 and that one couldn't hold 30 FPS either during explosions.Last edited by Barozi - on 21 November 2020