This is where Nvidia G-Sync technology will come in handily. It will allow a game to run at a variable frame rate without the graphics card being forced to send repeated frames so that the monitor can maintain 60hz. Instead, every frame rendered will be sent to the monitor as soon as it's available and the monitor will display it right away.
This will be doubly crucial for 4K displays, as otherwise it'll require far too much performance to maintain 60hz.
> But I still generally don't enable anti-aliasing over 2x unless it's a very old game, because it still costs too much.
You probably won't need it at all with this monitor, so you'll hypothetically be able to get some performance back that way.
http://www.guru3d.com/articles_pages/gtx_780_ti_sli_geforce_...
And these cards are 600-700 USD each.
I have to wonder how much that's got to do with unoptimised drivers and unoptimised engines. It annoys me that there are some games I'll never be able to run (on PC) as well as they ran on the devs' PCs.
I like a solid 60fps. Any time I see a dropped frames, or lagginess in a big scene, I pop into the graphics options and start cutting away fidelity until I get back to smoothness. Many games, even 5+ years old, don't run 100% at 60 fps on highest detail on the 680. Almost all games these days are GPU limited, as they're tuned for consoles. Asking to pump out 4x the pixels isn't cheap.