In-home streaming works very well actually, I use it all the time. Both ends of the line are wired in my case though, and I mostly stream games that are designed for controllers, which are already more forgiving on input lag. I play PlanCo remotely every now and then; and I did notice that Steam is trying to compress scenes that have a lot of similar looking areas, like the flat grassland or skybox. There I noticed some minor artifacts like you see in overly compressed jpeg images. However, I think this behaviour might also be a result of the game not being able to maintain 60fps and Steam trying to catch up by lowering the steaming quality. Which won't help of course, the problem is on the host PC that can't handle my densely built park.