I'll probably get one, I expect some sort of "eyetoy" type 360 games at some point in the future and they are great for the kids.
I think for family video chats they are great, even my aged mother could use one to talk to her grandchildren (if she had a 360 of course).
However I wouldn't be likely to have random video chats with other gamers that I don't know. I think once a few OCUK people get them then more will follow although the thought of McDingle squeezing his zits on a 50" TV isn't pleasant.