A few years ago that would have been completely impossible. In commercial air travel today, you have a few choices. You can read a book or a magazine, or possibly watch one of several movies. But soon, when you can watch a live soccer match, or a basketball game, or answer e-mail, or work on a report, the airplane will begin to look like your home or your office. Time goes faster.
Productivity is higher.
It will change air travel. It will also change in air infrastructure. With the GPS, or global positioning satellite system, it will be possible for every airplane to know exactly where it is and exactly where every other airplane in the vicinity is. We can move to a regional or even global air traffic management system. Just so I don't focus on airplanes, this is not the only place where the interaction costs will change.