Most folks expected Trump to 'lose it' tonight and as a result to have a meltdown and lose the debate. That didn't happen. Although he did exhibit bad behavior a few times, nothing deal-breaking. Especially since the moderators were blatantly in the tank for Hillary (as expected).
Instead of his campaign being over, I think he preserved the status quo and thereby saved his own bacon by not blowing it in the debate. That said, I would call the debate a tie (better than was previously expecting).
Just my two cents.