Unfortunately, 3D comes and goes. This is undeniable; a simple historical fact in the annals of 3D history.
The latest crop of 3D movies are not that good. I can usually pick 'em to pieces from a purely technical POV. Avatar is OK, I suppose; it's no House of Wax, however.
Most of you can only judge is what is available now. Chances are, few here have never seen a properly photographed 3D movie, properly projected through a good system like a polarized system and photographed with a great 3D camera system. The best "modern" system is IMAX, but there are/were many other camera systems over the years.
I am glad to see some 3D activity, but I fear when the wave is over, 3D will once again die off and we will wait for something else to arrive to revive stereo movies. D TVs will end up in garages and on Craigs List for ten bucks. We KNOW how to make great 3D movies and we know how to project them properly. We have known this for many decades. It is ancient technology that does not require reinvention. Just like the absolute finest color process ever invented is Technicolor and no digital system can touch it. Neither can any modern color process, clearly.
OT: The technicolor process required a HUGE camera that shot three strips of film simultaneously. The black and white negatives were processed and each negative was contact printed to individual strips of Matrix film. The matrices were dyed and transferred in perfect register to yet another strip of film. You needed 6-8 strips of film to make one color release print.
Anyway, I digress.
Some will say that people hate to wear 3D glasses so they patiently wait for something new; holography is often mentioned and that is a pipe dream for now. Fact is, if the projectionist knows his beans and the glasses are well made--even cheap cardboard glasses are fine--a great 3D film is a wondrous sight indeed.
Bob knows his 3D!