What Microsoft did with Hololens is a great example of what Google should've done.
But that actually requires management with a vision.
Not past tense -- HoloLens is a product they charge real money for.
And soon to be mass producing. They will be supplying 120k units the US army.
I have a friend who works at a company that uses HoloLens, their use case is so that mechanics working on planes can be remotely guided by a more experienced mechanic (not sure if they're engineers?) on what they have to do to repair the aircraft.