With regards to 1st party it would be these developers.
Very curious in seeing the results of SIE's ICE team, and how they helped to evolve the proprietary engines to run on PS5.
Some of the best impressive technical wizardry working in the industry, imo.
Also curious about the projects from Xbox Game Studios' latest recruits, namely Ninja Theory, Obsidian, & Bethesda Game Studios.
How much better will their games look and perform with the help of a considerably larger budget and access to R&D?
Would be actually nice to play a much less buggy mess of a game by Bethesda now that Microsoft will be overseeing the quality control to some extent.
Hopefully they won't be mired by that ancient game engine of theirs going forward.