I wasn't confused,, you stated
For example, it doesn't matter if you have 60 frames going, the human eye can only see 30.
This is not entirely true, and it is kinda taken out of context.
Yes the human eye can only see 30 FPS. But, video in of itself is different and we view it differently.
It is not easy to explain, and it sounds contradictory, and there has been a lot of discussion/debate over the decades of what is a good frame rate for games.
Technically speaking,, Movies are the only thing we really don't care about frame rates on, so long as they are running at roughly 30FPS.
The simple answer is, if it's running at 30 or 60 FPS, and it looks like crap, it doesn't matter that we can only see 30 FPS, we are still watching crap.
However,, yes, I think that we will get to Process, or, overall PC speeds that it won't make a difference