If size and weight matter, this tablet’s for you. It’s been two and a half years since Steve Jobs unveiled Apple’s idea of what a tablet should be — the now iconic iPad. Since then,more than 100 million iPads have been sold. They’re seemingly everywhere: Doctors use them to organize patient records; football teams use them as playbook replacements; musicians use them to create music, and artists, art; companies are adopting them by the thousands for a variety of purposes and school students use them for study.