I have coraline and my bloody valentine on blu-ray and its in 3d it comes with the old 3d glasses from the 80's red and blue lense and I play it on my ps3
That's not what 3D Blu Ray is, this is a different technology which switches between two different images for each frame of content. The special glasses then switch between the left and right eye correspondingly. This give you a full-frame HD image for each eye. The drawback being that the frame rate is halved. The red/green glasses are a cheat way of faking the 3D experience because your screen only produces one image, unlike when you see it a the cinema where they use two projectors.
I've heard that the true 3D blu ray tech is pretty amazing, but it's going to be expensive to upgrade to compatible players and discs (capable of producing 2 independent image signals).
If you want a better explanation check out HD Nation #18 at revision3.com.