I've wondered whether photorealism creates its own demand. Players spend hours in high-realism game worlds, their eyes adjust, and game worlds from ten years ago suddenly feel wrong; not just old-fashioned, but fake.

This is also true for non-photorealistic 3D games. They benefit from high-tech effects like outline shaders, sharp shadows, anti-aliasing and LoD blending - but all of that tech is improving over time, so older efforts don't look quite right any more, and today's efforts won't look quite right in 2045.

When a game developer decides to step off this treadmill, they usually make a retro game. I'd like to see more deliberately low-tech games which aren't retro games. If modern players think your game looks good on downlevel hardware, then it will continue to look good as hardware continues to improve - I think this is one reason why Nintendo games have so much staying power.

This has been the norm in 2D game development for ages, but it's much more difficult in 3D. For example, if the player is ever allowed to step outdoors, you'll struggle to meet modern expectations for draw distance and pop-in - and even if your game manages to have cutting-edge draw distance for 2025, who can say whether future players will still find it convincing? The solution is to only put things in the camera frustum when you know you can draw them with full fidelity; everything in the game needs to look as good as it's ever going to look.