I think these days it mostly comes down to human effort in development and not hardware limitations. You could spend hundreds of hours modelling faces or puttin

I think these days it mostly comes down to human effort in development and not hardware limitations. You could spend hundreds of hours modelling faces or putting accurate physics on a fern but it doesn't add too much to the game and costs too much to develop. What I think will be a huge boost is proper raytracing. You can see animated movies and blender renders look stunning but they take minutes per frame.