Sure, we've seen plenty of pics of the PS3's bluetooth headset before, but they were lacking context! Scale! The thing could be as big as your finger, or it could be as big as your leg. Lucky we've got this trailer (and it's wonderfully cheesy corporate-metal soundtrack) to set us straight!
Well there might be a firmware update associated specifically with this headset. If that's the case expect the cell to lend a hand in the clarity of transmission. Aside from that, I can only assume that it's some fancy proprietary hardware more compatible with the PS3 than your average bluetooth headset.