I commonly see Kindles, and on airplanes I commonly see at least one Kindle, BUT, SEATAC is on one end of my flights, so most of the people carrying Kindles in one hand are holding a Starbucks in the other hand... On an airplane I commonly see: About 50% of the passengers have laptops. About 5% of the passengers have netbooks. About 5% of the passengers rent a gaming console from the airplane company. About 0.5% own some kind of ebook reader. 0.0% reading anything on a cellphone-sized device. Kind of makes one wonder why people aren't working to improve the reading experience on laptops -- it would "just" require improved ebook reader software. Kindle for PC, Kindle for Mac, B&N Desktop aren't "bad" readers -- but they aren't very "good" either.