It does look good but then we all thought that about doom 3 also. It did look good but then behind that was just an average corridor shooter with monsters appearing behind you so often and predictably that it might be easier to go through the game backwards, then there was the gun / flashlight thing.
Don't get me wrong, it looks great but doom is about taking down hordes of enemies serious sam style not 3 at a time like doom 3. In short, looks great, will wait for opinions when people play it.