Those specs are exactly what I would predict as a current user. You need to run two renders at 75fps. The CV1 is set to have 90hz, so you can take advantage of that if you have a beefy computer.
DK2 owners already know it takes a decent PC rig for proper VR. Loss of frame rate results in a really bad experience. My current GPU gets hit really hard if I play a modern game with Vorpx and Oculus. I typically have to play on lower settings. Good developers have optimized games for oculus. AA is actually quite bad for many VR experiences, and that can easily free up some resources.
Clearly not all of VR needs to be high end. Look at the variety of apps for GearVR. You can still have an immersive experience without massive compute power. Just don't expect to play modern games with VR if you don't have the power to back it up.
Oculus is setting the bar high because they dont want people to experience jutter, VR sickness, and a poor experience. They've always said the launch is critical for VR to actually stay around this time.
more accurate link with highlights of mobileVR jam.
https://www.oculus.com/blog/the-rifts-recommended-spec-pc-sdk-0-6-released-and-mobile-vr-jam-voting/