I don't think reading/learning are productive use cases. Productivity, IMHO, means you create/produce something that is tangentially different (regardless of ho

I don't think reading/learning are productive use cases. Productivity, IMHO, means you create/produce something that is tangentially different (regardless of how small it is) than what existed before an activity. In the minds of most people, creating new knowledge or acquiring new information does not conform to the above definition. You could argue though that iPads and other tablets _help_ you stay productive on a broader basis. At least that's how I justify my use of my iPad. They simplify certain aspects of my workflow (like easier/intuitive annotation of PDFs). But I know that simplification is not at a level where I'd like it to be.