You want to stay connected. You want to be able to down content whenever and wherever without having to scrounge for a decent wifi signal. Many tablets and eReaders come with the option for 3G or 4G connectivity, meaning they run on the same data networks as cell phones. Access to these networks often only requires a one-time fee, so you don't have to worry about monthly costs. If you want wireless access to the content on demand, check out the tablets and eReaders listed below.