Holm will either knock Tate out or the referee will stop it because Tate is taking too much punishment. Tate is in much the same position as Rousey, she either has to stand and trade punches which is a bad idea, or try and take Holm down which didn't work out well for Rousey who had an impressive take down record and has already beaten Tate twice.
I predict Tate will talk about it being her turn to take the belt etc, and that she's got a much smarter game plan than Rousey. But reality will bite early in the first round when Holm starts landing punches, she'll either desperately try for a take down and get knocked out trying, or she'll try and trade punches and get knocked out trying.