Tablets are virtually tailor-made for our summer vacations, whether we're checking email at the hotel or watching movies during an airport layover. The manufacturers must know this, as there's a surge of new slates set to arrive while the weather's still scorching. Our 2013 summer tablet buyer's guide will help you decide which of these models is worth space in your travel bag. There are also several veteran tablets we recommend, although some of them could be obsolete soon -- we'll let you know when newer devices loom ahead. Whether or not you want the latest hardware, though, our gui