Maybe so, but it isn't a cheap gimmick. Tens of millions of dollars are being spent (much of it subsidized by the studios) to get the projectors into theaters.
That said, with digital technology elimination vibration blur (on old analog cameras it was impossible to keep the two cameras perfectly in synch) completely the only problem I have with it is the dimness if the theater isn't keeping the lumens at the right level (that is one reason they need the new projectors, they need to be able to project much brighter than traditional ones) and the glasses.
Katzenberg mentioned one thing at the presentation I went to where a top end sunglass designer had made a prototype of regular sunglasses with the appropriate left right lens polarization to do double duty for 3D movies. I'd be cool with that (especially if I'm going to have to see ten 3D movies a year for reviewing).
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