Usually the Consumer Electronics Show (CES) in January ends up having a "theme." It isn't a theme given to the show by the organizers, but instead some product category that seems to be pervasive throughout the show. Last year it was 3D television. This year it was tablet computers.
While tablet computers have been around for almost 20 years, they have been primarily premium upgrades from standard notebook computers. In the past, tablet computers were targeted at business users. Medicine was going to be revolutionized by tablet wielding doctors and nurses.