I think what we're all skirting around is, "3D" isn't very realistic. It's a nice effect, at least some of the time, maybe MOST of the time, but it isn't really very true to life. Perhaps UHD will bring more realism. Perhaps "4K" will keep enough interest until "8K" which might bring the full package to the table.
Or perhaps we could appreciate it as an art form in itself, and not look for a complete duplication of "real life."
I'm on the fence. I wouldn't pay a noticeable premium for my next set to be 3D, but I'd lean toward a 3D capable set. My wife is opposed to it (vision concerns). But I definitely plan to see another 3D movie in a theater, perhaps an IMAX, when I get there early enough to get good seats. And I HATE going to theaters. But I want to see a good 3D production. But I could not sit thru Avatar. Cheesy plot.