Omni-blades, yeah. Used for heavy melee for most non-Krogan, non-Biotics.
The game is going to be a lot of fun. Plotwise it may be stupid, but most fun games are at least a little stupid. But the mechanical improvements are looking to me like they'll bring back ME1's depth with ME2's playability.
Plus, the multiplayer is about 100 times more fun then it has any right to be, and even the limited demo creates awesome moments. I've had a Cerberus lackey about to stomp on my head and finish me, only to watch his head vanish courtesy of the squad's infiltrator. Saved a teamate with Stasis when a Nemesis' blade was descending on his neck. And popped more heads then I care to count.