I am wondering what your opinions are about the utility of naming cats?

I have 2 cats as of a couple of weeks ago. I am wondering what your thoughts are about the utility of giving them names? I know, when I bring them to the vet they will need to have names associated with them so their records are kept straight. However, in 2 weeks I don't think I have found any occasions I could see myself actually using their cat names around the house. They seem to respond better to "meow" noises than human words. I think they are turning me more into a cat than I am turning them into people. Anyway, do you think your cats have learned their own names? Do they respond to them? Do they come when you call them? Do they react to tone of voice?