Coming Soon? One R - 3D Mount - When, How, What?

COMMUNG SOON - The 3D Mount - Two cameras are better than one. The 3D Mount uses two shooters of your choice to capture high-res steresocopic video

After almost a year with the One R, I've found the 360 Mod to not be as useful as I thought it would be. The main reason for this is because the exported footage is only in 1080p and not 4K. Nearly everything is 4K now and adding 360 action footage to my 4k videos looks terrible.

It looks like this 3D mount could be useful, IF, it saves both lense videos in 4k. And if two 4k mod lenses can save in 4k, then why can't the 360 mod?

I know a lot of popular bloggers get betas to test. Does anyone have info on this mount?