Is live action just putting filmed footage into a game?

sounds expensive

Yes, and also you can also watch them separetely.

Seeing in game cutscenes/gameplay and then transition to real filmed scenes could be a little jarring and could prevent smooth transition from cutscene to gameplay. Immersion could be lost. To me it seems like a pointless gimmick that could ruin the game when they could of just used actors likeneses with mo cap.

I also wonder how long the actual game is. If it's shorter than 6 - 7 hours it's going to get slaughtered by the press.

That or it could be the opposite as well. Remedy has been wanting to mess with this idea for a long time.

The cutscenes don't seem to be long enough to break the flow of the gameplay.

What if it is 8 hours?

I'd say with replayablity, that would be more than acceptable. It's just that the press have this sudden need for a certain amount of hours to justify the asking price. It's stupid but they've set a presedent they can't break without looking hypocritical.

• Mulitple versions of live action will be shown, based on your gameplay choices.
  

Yes, but what about the actual gameplay? What will those choices be? Will they lead to whole new sections or will they simply be a different diologue tree?