08/31/2010 01:52 pm ET | Updated May 25, 2011

eReader Comparison: Kindle, Kobo, Nook and Reader Go Head-To-Head

With Amazon's recent announcement that digital e-books outsold hardcover books for the first time, and paperbacks destined to a similar fate in the near future, we can safely say the e-book revolution is upon us. That doesn't necessarily mean, however, that the devices upon which we read those books -- digital e-readers, tablet computers, smartphones -- are anywhere near their final form.