It was garbage time but he did have 2 90+ yd TD drives, he is more mobile than the JG and HB, his arm is stronger and he made quick decisions. As others said, he threw the ball upfield and the last TD was a great pass.
HB did nothing to show he is the hope for the future. He missed open receivers up field, is not any more mobile than JG. UF is not known as a great defense and HB only had one decent drive. Did not even have a second drive that got the Vols into FG range. If HB is not the next big thing, there is no reason to give him time over a more productive and athletic QB.