Is your notebook still your preferred second TV? Well, it seems you're now in the minority. The hip new way of consuming the drug of the nation -- after the 'ole tube itself -- is on a tablet, according to a recent Viacom study. Over 2,500 people were polled nationwide, and the results show a shift away from computers and smartphones to slates. Tabs made up 15 percent of full-length TV show viewings, with the increase of streaming services and