Hololens Next: We (Mostly) Know the Projector. What Waveguide?

It's funny how many patents point to a MEMS laser scanning projection display. I've only read a little bit here about waveguides, and I haven't even seen much in the way of new patents from Microsoft on their (Nokia's) patented subtracted grating method.

Supposedly, DigiLens (privately held) has been claimed by some to be years ahead of the competition, with their nano-printing technology.

On one hand, I could see Microsoft going in-house, but at what point might they actually be not only developing an inferior product, but it might not even be cheaper to do so, in the long run.

I've only seen a couple patents in the way of combining two displays, but not the canvas itself.

What are your thoughts on this, guys? Obviously since DigiLens is private, I am not looking for another stock tip. I suppose I'm more interested in something pairing correctly with the MVIS engines. Any leads?