Well, I must admit: Hillary won the debate. I think she exceeded people's expectations. And let's be honest: some people were expecting her to collapse on stage. But, she looked good, and she sounded energetic, and that made her a winner in itself. And she put Trump on the defensive a lot more than he put her on the defensive. And I think she spoke more succinctly than he did. A lot of the time, he seemed to be scrambling; he seemed flustered; he repeated himself a lot. There were a lot more times in which she was amused by the difficulty he was having than vice versa. She was definitely calmer and cooler. In fact, I don't think there was any time that he really put her on the ropes. I think she dealt with everything he threw at her and deflected it.
So, I predict that she is going to get a bump from this and will pull ahead in the polls. And I also predict that Trump is going to put more effort to prepare for the next debate, including doing a mock debate. This cost him.