We may be talking about two different types of 3D. So let’s get all the details out in the open.
3D, in its early stages, the red/cyan (& several other two different colored lens) paper glasses, those type of 3D movies will work on any TV. Recent movies like Coraline, Journey to the Center of The Earth, My Bloody Valentine.. all those 3D movies came with their own two-colored paper glasses to watch on any TV. Those work because the movie shows both the left & right images at the same time, just in different colors (anaglyph), which is why the lenses of the glasses need to be different colors.
This new 3D technology is very different. The new glasses use a method called, active shutter. In which, the TV now produces each image separately for each eye & alternates those images. The glasses act like shutters on a camera, allowing only certain images to go to each eye. They flicker/alternate at an incredible speed of 50 frames per second/per eye. Because this is happening so fast, the brain merges the two images into a single, 3D image. The movie Monsters vs. Aliens uses this type of 3D. It is NOT CHEAP. Here it is for sale on amazon, for $350 for just the movie & glasses.