I sort of forgot about these guys for some time. Visited their website and twitter today and saw that they offer positional tracking and motions controllers for Gear VR !!
Check it out:
Has anyone worked with the dev kit already?
Do they have a plugin for UE4 ?
I wonder if Epic would be interested in helping those fellas adding support for UE4 - it could work for both Gear VR and Daydream.
It says on page works with Unreal but ive seen nothing of this til now. I would be all over this if they Unreal would tie it in…
Supposedly tracking is horrible, but if it had UE4 plugin and docs about how to use it with Gear VR and UE4, I’d be already checking it myself.
So they developed a tracking device and the tracking is horrible…sounds promising 
Sony developed PSVR with horrible tracking that can be further affected by light (so ideally you should be playing in the dark). Nothing too out of ordinary 