Well sometimes otherwise intelligent people miss the obvious, even when, in a sense, it's staring them in the face. I get that feeling a lot myself when I'm on this forum.
Yes, MixedRealityTravel.com seems an obvious one for a person (one of hundreds) working on mixed reality. But why stop there? I mean you yourself have spent a pretty penny on hand regging lots and lots of future tech domains, and when you count in renewals, that's a sizeable investment with no guaranteed return. I mean, I'm sure you will make a nice profit if mixed reality does become huge (and the term for it sticks), but then these guys are going to become rich if mixed reality takes off no matter. The value of a longtail domain name such as 'MixedRealityTravel' isn't even obvious to the non future tech domainers on this forum, let alone somebody who hasn't a clue about domains and their value. You may as well say, well if you're so certain about the future of mixed reality, why aren't you investing in start up companies, or purchasing shares in Microsoft etc? You can buy a share in Microsoft for $58. Unlike a domain name, you can go back online and sell your share within 30 seconds.
I must admit, I did ask your question when the term 'merged reality' first came up earlier this year and I was able to handreg a few premium and obvious ones. Such companies as Intel could even coin a term for a new tech (or an existing tech) simply for the purposes of cleaning up with the premium domains. You can imagine the guy at Intel whose job it was to create the marketing term for their new tech actually checking to see if the premium domains were still unregistered. 'Hey, this new fangled tech we're about to announce is really just a version of mixed reality, but those buggers at namespro have already regged the good ones there, so I'll call it 'merged reality' and register 'mergedrealitycasino' etc before I announce it even to the board of Intel, hehe'.