Watching this video from bbc news I noticed one very bad thing from the move system: it's ability to see infra-red.
Infrared not working:
When the man is showcasing how move works, the tennis racket jumps from his controller to the lights above, and then to the tv in the background. This is also annoying for the wii, as the sensor in the controller can sometimes think you're pointing at the tv if you're flailing your arms in the air pointing at the ceiling lights.
This problem begs the question, will move actually work? The playstation eye camera is so temperamental when it comes to lighting conditions (too bright that it doesn't sense you moving and instead concentrates on the light source, or too dark where it doesn't see you at all) that can this technology actually work well? Natal solved this problem with the introduction of the infrared projector that can see people in the dark and light Sony has no other feature than the playstation eye tracking infrared movement, which in my opinion is silly when so many things in the home give off a infrared light (Tv's, lights etc.)
Time will tell I suppose