Not sure if this is old news but did a search and couldn't find anything.
Looks like the long sort after 4k display is on the horizon. Probably due to Oculus/Samsung relationship but 747ppi seems to be coming soon. And I'd guess 5.9" screen is a good size for the Oculus CV1?
I've read that this screen is for the Note 5 coming out next year, which of course means that the version of Gear VR for this phone will be 4K, regardless of whatever gpu performance is available at that time. I can't imagine using a CV1 with 1440 when I can have 4K. John Carmack did mention that it was possible to use interlacing to get 120Hz out of a 60Hz screen by alternating every other line on the display. It's probably not a coincidence that he brought this up. Either way, as much as I am a fan of Oculus, I will buy the one with the highest pixel density as long as it is optimized for VR.