Health applications: pretty cool for education, maybe other things, eventually.
What I think would be compelling, for me, is the ability to use it on travel. To be on a plane and not have to worry about breaking a laptop screen when the person in front of me tips their seat back, not have to worry about someone shoulder surfing me. In yet another boring hotel room? Let's escape!
Now, the problem is that, in many meetings, a laptop is barely acceptable as it is (in some cases, not at all acceptable). So, I still have to bring a laptop. So, my backback is now ... heavier? I'm already carrying multiple devices required by various security policies.
Is this juice worth the squeeze? I can't bring myself to spend my own money on this. And I helped develop an AR device. I'd be happy to use it if the company bought it. But you're in for almost $5k after applecare, accessories, etc.