Man, those jungle scenes were insane... the level of detail is amazing... I seriously doubt i'd be able to play it without dropping some big bucks on system upgrades
Crytek are the same people that created FarCry, so they know what they're doing. If anyone has played FarCry, it's an awesome game... they should be able to get the combat fairly balanced with extremely intelligent AI.
The biggest distinction i see with current gen games and "next-gen" games are the lighting effects and textures. I almost dropped my jaw at that lighting example (the indoor example, not the forrest). Also, the textures are looking spectacular. The leaves and ground were extremely detailed, and seem to be running smoothly.
The thing that surprised me was the "depth of field" example. I've never noticed the problem with the way games are now until i saw that example.... It made me realize how much better games could look and feel, lol.