Well here's something interesting from wikipedia, not sure how accurate it is, but it's worth looking at :
The current 3D "fad" has had a LONG incubation period. Both Disney and IMAX were in the forefront since 1985 and 1986. Of course Disney used the technology at DL and WDW, and IMAX had several film. In Nov 2004 IMAX had it's first animated 3d movie with Polar Express. But, not until "regular" theaters found is economically feasible to convert their theaters for the "new" 3D. And that started around 2005. Disney had Chicken Little in 2005 in regular theaters that were converted. And in a Wonderful Creative move, this first 3d animated feature by Disney featured 3D Glasses in the same style as worn by the title character Chicken Little! So I would say the current 3D fad started in 2005. And with additional theaters being converted, and the cost of these conversion, those 3D movies won't be fading away, anytime soon. However, theater up-pricing the 3D movies will have a backlash at a certain point. If they haven't crossed it already.The Walt Disney Studios waded into 3-D with its May 28, 1953 release of Melody, which accompanied the first 3-D western, Columbia's Fort Ti at its Los Angeles opening. It was later shown at Disneyland's Fantasyland Theater in 1957 as part of a program with Disney's other short Working for Peanuts, entitled, 3-D Jamboree. The show was hosted by the Mousketeers and was in color.