Portable Air Conditioners without hoses?

Question:I've seen portable air conditioners that don't need a hose for the hot air outlet. Are they a waste of time? Surely they must blow the hot air into the room too.

Answers:
I'v seen a number of models in a office building but the only worth wile ones arn't really airconditioners...you just fill them with ice and it blows air accross it