Hmm... just spent the afternoon playing the demo and my overwhelming impression was that this is just Biohazard 4.5 with Army of Two's partner system.
I loved Biohazard 4, and if all that Biohazard 5 was was an updated version of 4 with prettier graphics I'd still be a happy man.
I'm pretty disappointed that the creators decided to go for the Army of Two approach. Like not sonic said, the camera was already pretty lousy, and because Sheva's in the way half the time I found it much harder to navigate through the maps.
If they wanted to implement co-op play, they should have done it like Doom 3 - only one character in single player and both characters only in co-op.
The new graphics are beautiful however, and I kinda like the new "real-time" inventory screen. It kinda makes the game a little more frantic, and brings back a little of the survival horror feel to the run-and-gun style.
Did anyone else notice that the "zombies" seemed to have creatures very similar to "Las Plagas" inside them. I wonder if this is "Las Plagas" again, or something new. I'm guessing Plagas, because there can't be *that* many parasites that turn their hosts into homicidal zombies out there.
One final complaint - the chainsaw wielding guard in the shantytown area... Just. Would. Not. Die. I found my willing suspension of disbelief sorely stretched by how ridiculously difficult that thing was to kill. Five exploding barrels, three grenades, several electrical shocks, and countless machine gun rounds to kill a zombie?! The executioner boss went down more quickly, and he was physically twice as large.