I have been somewhat reticent regarding Bioware's use of full in-game voice overs, because quite frankly who wants to stand around listening to quest text when what we all really just want to do is get the quest and head out to complete it. I'm still not entirely convinced voice overs will become burdensome and annoying, but the first released game footage does look promising.
The footage reveals the Bounty Hunter, Smuggler, and Sith Warrior classes and shows a few segments of various combat scenes. Of interesting note is that TOR's use of cover! I've never played an MMO that used it and find it's use here to be intriguing.