VR isn't gonna work like the current high-budget, high graphics industry works. VR *needs* a consistent, high framerate. Anything less and you're liable to make people uneasy or even sick. And nothing is going to put people off more than the mainstream complaining that doing shit in VR makes them sick, literally.
This is another big reason why games/experiences need to be built with VR in mind from the get-go. Right now, many people have the mindset that, "Ok, I cant get 60fps, so I'll settle for 45-50fps" or whatever. That wont work in VR. Its max framerate or bust, basically. Gsync will only go so far in eliminating the painfulness of fluctuating framerates. You absolutely need a solid, consistent, fast framerate in order to break the flicker threshold and give a person an experience they can play for a length of time. That is not an optional nicety, but a requirement.
So developers will have to keep this in mind and not design anything that is going to severely limit CPU's. That's the big thing. And of course, building an experience that takes it easy on GPU's is also good, but options can tend to reduce the demand quite drastically in many cases. VR will absolutely require a step back in terms of graphics. Both the resolution and the design of the games cannot keep neck-and-neck with cutting edge 2D gaming for the most part. Some will try, like Project Cars and Star Citizen, but these will be the extremely high end experiences that only some will be capable of using in the short term. But graphics cards will get better and VR tech will get better, and even things like DX12 should help a lot, so there will be somewhat of a convergence on this stuff, but bottom line - if you want great VR, lower your expectations on the graphics fidelity aspect right now. That may seem disappointing sounding, I know, but seriously, quality VR is such a revelatory experience that it wont matter. Great graphics might be something worth pining over, but I don't think anybody is going to be complaining when they're completely immersed in the most exciting thing in gaming since.......well......ever, probably.