Looking to see which Quest 2 games are getting graphics upgrades on Quest 3? Here's the full rundown:
TL;DR: Drop Dead: Dual Strike, Espire 2, GOLF+, Guardians Frontline, Hubris, Red Matter 2, The Walking Dead: Saints and Sinners, Vermillion, and Zenith: The Last City.
All games will look better regardless, many games will get a resolution bump just for using Unreal or Unity, these are just the games that developers are manually releasing new assets and tailoring the visual settings for.
Most companies are developing new games from the ground up, rather than rehashing current games just to look better.