Doesn't sound like a new genre to me: At best, it sounds like interactive machinima; at worst, merely an old genre with extended cutscenes.

Something to consider... People that like movies go see movies; people that like games go play games. It a rare customer that wants both in their entertainment experience. The people that want movies will complain that they have to jump through all these hoops to get to the next chapter while the people that want games will complain that the cutscenes are too long and let me just play!

I think it's a neat idea, but I wouldn't go so far as to put "new genre" on the box if you know what I mean and I would be really careful about thinking of who will play your game and what they want out of it.