Whilst more resolution would of course be nice, it's fairly low on my list of important advances I desire in VR. I use VR almost daily and my top 3 list is probably: 1. A wider FOV, 2. a lighter headset and 3. Wireless

In terms of encouraging broader adoption - cost and lower required specs for the GPU is probably top.

The weeks-away(?) new Microsoft-associated 1440x1440/eye headsets will be an improvement over the Vive/Rift 1080x1200 PenTile.

Higher risk, but almost "retina", is foveated displays like Varjo http://www.ubergizmo.com/2017/06/varjo-20-20-vr-headset/ http://www.kguttag.com/2017/07/10/varjo-foveated-display-reg... .