I agree with you that integrated binding systems are here to stay. That said, I don't know how much more they will dominate the market than they do now.
Volkl Motion and Salomon Pilot do well because people are generally receptive to Marker and Salomon bindings. It's a much tougher deal for the companies that are owners of, or are affiliated with, the other binding producers - Rossi/Look, Tyrolia, Atomic. While these bindings certainly have some fans, they defintely don't have the market acceptance that Salomon and Marker have.
This really forces Rossi, Dynastar, Atomic, Head, Elan into a pickle because they would surely reduce their ski sales by forcing people to buy their bindings. I believe Atomic wisely increased their number of "flat" models for this season.
Personally, Markers have always worked for me so I don't really have a complaint. The one segment of skis that I don't think will go to systems is fat skis.