After watching the whole presentation twice I would like to point out a few things that didn't go unnoticed.
Pros:
1. Fantastic environments, great textures, beautiful sets which are true to the film feature with high attention to detail (easter eggs).
2. Superb lighting and sound effects, especially the audio segment of the game.
3. Huge variety of customization options + more then sufficient arsenal of fire power.
4. Hudless experience on Ultimate Badass difficulty + substantial increase of taken damage.
5. No magical COD life regeneration mechanic.
6. Entertaining and dynamic MP modes.
Cons:
1. Lack of facial expressions. C'mon even the tiny soldiers in Company of Heroes are more animated then those guys.
2. Decreased acid damage in MP. According to GBX, cpl. Hicks is wearing those bandages as a fashion statement.
3. No friendly fire in MP (not sure about that one). If someone could have told that to Frost who was lid up like a candle.
4. No visualization of the secondary weapon which is suppose to be strapped to the back. Apparently the marines are using their assholes as luggage compartments.
Bottom line, ACM will be fun to play and I'm tremendously grateful to GBX, Sega and everyone involved in this project but I don't see how this can be considered as a sequel to Aliens.