The complexity of writing games isn't just related to graphics though its all the logical decisions made by the game engine itself that focuses on CPU performance. On PC you have games that require high CPU resources but low GPU resources for the minimum graphic level and the reverse where CPU resources are lower but GPU resources are higher in comparison. I've been happy with graphic performance for quite a while but actually like games where the world is more alive with more stuff going on in the world. If you look up into the sky in Skyrim and you can see the moon slowly moving in the sky rather than being fixed in the sky I think that adds a lot to the world. It's a tiny thing I guess but makes it more immersive. If you asked me how I would like to see gaming develop I guess I would say more CPU resources, more memory but maybe less push for graphic fidelity but this could still increase the price of game development. I play some PC games at 720p and 4K on different computers and yes 4K is definitely nicer but I don't care that much about the difference. However I'm not as keen when a game engine is simplified to work on a platform with lower CPU resources and these finer details are lost. You could have a game with amazing graphics that was easier to develop purely because the game engine was relatively simple, perhaps a classic 2D scrolling shoot em up so it could have incredible 8K visuals and still be cheap to develop. You could also have a game with 720p visuals and poor textures but was extremely expensive to develop due to a very complex 3D world with many things going on. The more complex the game world the longer it takes to iron out the bugs which makes it much more expensive to develop.
On PC you can run games on hugely varying graphic levels from 640x480 with basic textures and missing graphic features all the way up to incredible 8K visuals but if you don't have the CPU or memory to run the game engine you ain't playing that game. You often get games where you can alter some files to get potato settings which really lowers the graphics but enables weaker PCs to run modern games. There is no option to change the game engine itself though, yes some graphic features require CPU resources too so it will simplify the game but there is a core amount of CPU processing required to run the game at all which you cannot get around.
