I still think graphics will just continue to improve.
I think we are still at an early stage in GPU development.
Until we see single cards that can run 8k and higher with all the details maxed out on games that won't be available for another 10 or 20 years we won't even be close.
Then there is VR which is only going to get more demanding.
I also think that TV/monitor screens are only going to get larger with resolutions to match, image what will be needed to drive a setup that covers an entire wall in your home.
In 20 years time people will hold up a Titan Xp and say how can you call this a serious graphics card, it is too big, too hot, too noisy, too power hungry and not even fit to drive very basic setups.