Upcoming change in movie structure?

When you browse Amazon movie rentals, you are offered a two-minute free preview. (Probably the offer would be better were it for the movie’s trailer.) The problem is that movies today, with extensive credits, don’t make it past the opening credits.

I would bet that within a very short time we’ll see movies that open (as the classical James Bond films did) with a two-minute cliffhanger, credits to follow.