To be honest I don't think that 3D was being taken seriously at all till the movie "AVATAR" was released, the first film to be fully shot in 3D. Much like how animated movies weren't totally realized till the release of "Toy Story" with the release of both of these films there have been a ripple effect. In the years after Toy Story's release we saw a wave of Computer Generated childrens films, almost all but wiping out the traditional hand drawn films, many of us had grown up with. With the release of "AVATAR" we saw a surge in films "claiming" to be fully 3d (it was really hit or miss)
Even HDTV sets are being offered (claiming) to have a 3-D effect. Even in the world of VideoGames, companies like Nintendo are release products that are capable of 3D imagery without the need for glasses.