>>300605445
>the colors on a good vr panel are seriously better than your 4k monitor.
No, they aren't, and even if they were, the screen door effect and pentile soon put a stop to that.

>so the lower relative resolution of the hmd doesn't matter that much.
Assuming no upscaling (which nobody does because any rig in the past decade can upscale 720 to 1080 perfectly), a 720p image on a 24 inch monitor placed 30 inches away (a typical desk setup), gives you a PPD of 34. 1080p at the same distance gives you 51.

What does an Index give you? 16. You'd need to be watching SD content at 480p on that same monitor, again, with zero post processing, to get as low as 18 PPD.

So yeah, the resolution matters quite a bit.