The popular new e-readers aren't exactly our beat at the show, but they could be significant to the publishing business if their promoters have their way. They might even be the way you'll read your favorite magazines (like Home Theater. Sony has three models, including the new Sony Reader Daily Edition. At $400, it's not only the largest of the three (7"), but the only one of Sony's offerings that let you download on-the-go via 3G.