I figured a good first game to test would be DOOM (2016), and I ended up sinking two hours into it right off the bat. Absolutely a SUBLIME experience playing that game on a portable 1080p/120hz display. I got 90+ FPS on Ultra quality which blew my mind.
Also, VRR is a game-changer for me. This was by far the smoothest I've ever seen DOOM (your mileage may vary of course).