[nathanb]

I think you're missing the point of what I said. I didn't say that story-based games should be movies rather than stories. I said that if games don't utilize the interactivity of the medium, they may as well be movies.

If the interactivity is what draws you (as it does in your example of Mass Effect), watching a video of someone else playing the game is not going to be nearly as satisfying as playing the game yourself.

My point was that the only games whose sales will be materially affected by Let's Play videos are the ones which may as well be movies anyway.