Do you have a source for it being curved? That's the first time I hear this.Sony has a customer 120Hz curved OLED panel with full RGB stripe, and apparently thenpabel is designed to cram more pixels.in the centre of your vision (but this might be something to do with optics or a combo of both, not sure).
Also, the "more pixels at the center" thing is purely a function of the optics and was already the case on DK1(!) and DK2.
Finally, you are missing the part where 2 screens (as on Rift and Vive) allow you to more effectively use your available pixels than a single screen does, and also allow for more accurate optical IPD adjustments.