It seems as though we will be getting 3D movies in your home by the end of this year, and the good news is that if you have a playstation 3, and a 1080p tv, you will be ready for it. The playstation 3 will simply need a software update to decode the MVC codec on the blu-ray discs, and you will need to buy an infrared transmitter along with "blinking" glasses, the same hardware that has been used for 3D computer gaming for the last few years.
Blu-Ray 3D specifications finalised
This is good news, as I know I can purchase a new tv or a PS3 and not have to worry about upgrading for 3D movies later on.
Edit: According to Mark's post later in this thread you will need a true 120Hz input signal to the tv to avoid flicker issues. All current LCD tv's (there are only a couple of computer LCD monitors) don't have this - they interlace the output signal when claiming "100Hz" or "200Hz" so it looks like you will still need a '3D ready' tv before you can be assured you will be ready
Edit 2: After reading alot more about the specs of 3D blu-ray, they will leave it up to the tv manufacturers on how to implement 3D - be it polarisation techniques, shutter glasses technique, or other technique. One thing I believe though is that the tv will need to support frame packing 3D formats - so new displays will likely need to be purchased.