what i believe is that the 3d effect is designed for a limited range of interpupillary distances
amd a limited range of depth-of-focus and lens accomodation, hence it can only work (as currently
designed) for a portion of the viewers.  the others either won't be able t see it, or they'll get head-
aches and eyestrain.  hence it's necessary for the shills to inflate its potential, even if
it's not going to work for some unknown fraction of the population, because of the huge sums
of cash involved in forcing the public to buy into it.  like the real estate bubble or the south seas
bubble.