Metal Gear Solid 4 Long Cutscenes

It's been revealed recently that Metal Gear Solid 4 will have multiple cutscenes which will approach 90 minutes in length. Players will have the capability to pause or skip the cutscenes.

Cutscenes of an hour and a half long? Isn't that a bit much? I can get frustrated with 5 minute long cutscenes. I tend to watch the whole thing because I'm interested in the story, but I don't know about 90 minutes long. That seems absurd.

The game creators say that gamers who skip the cutscenes will miss out on a lot of the story. Why isn't this story being told in a playable format? Interaction, people! That's why it's a game and not a movie!