At the moment, the effective vertical resolution is about 3240p, and the horizontal I'd guess would be around 6000p. And that's just the technology preview, I don't see how you think VR is going to be less than your setup, when it's already more..
I think pixel density is what people want - to make full use of that 3240p you would have to move your head quite considerably, to make use of a large monitor from 75cm away doesn't need nearly so much head movement.
It's what I want and am hoping for, but the current DK2 is in no way usable for this
edit: ah I see, I hadn't factored in the warping of the optics, if you're correct then the effective resolution would only be around 900p so I'm being too optimistic :)