well... the second dev kit is 1080p, and they're $350 a pop... I would imagine that the final product will be the same, or better maybe, we are getting some pretty dense displays these days in OLED form like that which the rift uses.
Mass production will bring the cost down, I doubt they would bring the price down, but it would likely increase their profit margin. I think 300-350 will be the final price, they've set a precidence with the dev kits (which aren't such things usually more expensive than the final product?) and end users have shown they're willing to spend that much on an untested, unfinished product with very little software support.
I meant 1080p aka 1920x1080, not 960x1080.