Futr has some premium Holo names. I'm pleased with my portfolio as well - started regging around the same time (2008/09). Some of my best names : Holo-TV.com HoloBoxing.com HoloFights.com BestHolo.com I also doubt if anybody has a better adult holo portfolio than me

I own just about every adult Holo+keyword combo apart from the top handful of premium names.
As far as your second point is concerned we're already seeing many VR end users brand themselves as Holo, so I don't have any doubts as to the future value of holo. It also sounds better, generally, than MR (which will always be hard not to read as 'mister', especially at the start of a domain).