The Independent has an article talking about the soon appearance of ity-bit bots that might be useful in surgery. They mention a time frame as close as 2 years which is probably optimistic. Frankly, the possibilities of these little future-bots concerns me. It's like being able to make a machine invisible which opens the door for abuses. Hopefully, the good will far outweigh the bad, but I'm afraid human nature is not on our side when it comes to abuses of technology.