The latest developer diary for Star Wars: The Old Republic, posted above, makes an excellent point about the combat featured in other MMORPGs -- it's super unfair. Take a look at World of Warcraft, in which some dungeons pit 40 "heroes" against a single dude. Those odds don't sound very "heroic" to us, sir.
That's why SW:ToR hopes to even the odds by sliding the hero-to-villain ratio slide more towards the latter in most in-game encounters. Don't get too worried about being outnumbered, however -- based solely on the maneuvers featured in the video above, we think that small group of enraged Tusken Raiders is going to drop like a sack of bricks.