I'm talking about practicing display scaling. So that way next year they could do 4k during VR use. That would be a benefit. You don't want to use 4k all the time though cause like you said, that would cut battery life.
Ditto. Hopefully 4K devices have hard scaling so 1080p, 1440p and 4K (for VR) can be options to the user. Still doubt we will see a 4K device for VR for another two years. Well, a 4K device that does not run crazy hot and drain battery fast. VR splitting 4K chokes PC's, so seems we are still a ways away from an efficient GPU that can manage rendering 4K into two separate images at same time, while pushing the math for both in a phone sized device.
1440P split in two runs hot on current devices and the same fabrication tech is used in the road map through next year.