Hmmm...so, the cover can be completley destroyed ! Thats cool, as I thought it would be only partially destructible, but as shown in this AI demo, it is completely destructible and then the AI moves to find another cover.
I think i read in some preview saying that cover can only be completely destroyed in some parts, and in others not.
Edit:
ign said:Killzone 2 can do some pretty nifty destructible terrain when it wants to. One section we played (and which you can see in the LiveWire Demo from E3) was essentially a Helghast shooting gallery. You hop behind a gun emplacement facing a building that's had the front wall sheared away to reveal the floors inside. Helghast run out on multiple storeys to try and take you down, but they're no match for the awesome power of your heavy weaponry. Not only do you mow the Helghast down, you mow the barricades they try to hide behind, you chunk out cement from the walls, and eventually you bring huge sections of the structure to the ground. It's awesome, but sadly not reflective of the wider game, where most structures are impenetrable.