Watched a video of an Invasion game (Elite perspective, guy also has a Spartan one too and other junk):
Laser starts around 3:47, skip to 4:00 though and..well, just watch >_>


Looks like it is exactly the same as Halo 3, rapes any vehicle that comes in its way.

Edit: What's up with the elites holding the weapon with two hands now, I kind of liked the one-handed way found in Halo 2 and 3.