It seems like you'd need some giant 4k monitor to make it sweat.
But also Steam doesn't seem to be releasing a ton of graphics-intensive games. It seems much more cost effective to get away with a lower price and less intensive art requirements and focus on gameplay. And less graphics puts you in a safer place as far as ports to consoles and tablets/mobile (e.g. Stardew Valley).
The Vive HD upgrade will push the envelope further, but I don't think VR has great success. (Elite Dangerous in particular gets boring because it's rather easy to make a ton of credits to afford everything)