I would say realism. Increased immersion into the game... not necessarily the full VR effect, but with increased hardware capabilities and improved game physics and graphics, games are becoming more and more realistic. The latest Resident Evil 2 teaser is a good example. If you look at the realism around rain, puddles, heat radiating, wind in grass effects, etc, things are getting closer and closer to real world.... which sucks you into the game more. The CyberPunk2077 game looks incredible... it's easy to look all "Blade Runner" like when it's dark and shadowy, but they seem to be pulling off that effect during daytime. From a purely technical perspective, it's the almost subliminal improvements that you don't really notice that will have the biggest impact. Failing that, game AI and story will be the biggest drivers, in my opinion. If you have a great story, and strong gameplay, then the tech doesn't matter. Case in point, the N64 GoldenEye is still one of my all-time favourite games. From 1997. It just fucking rocks. Shit hardware, old-school game engine, etc, but a fucking blast to play.