With the $199 Kindle Fire tablet, Amazon flexes its retail muscle and once again proves it's the master of the impulse purchase. The device has seemingly been built for the sole purpose of delivering movies, TV shows, music, apps and e-books from Amazon's vast collection of content, and you can either store your purchases in the cloud for instant streaming or download them straight to the Fire with minimal fuss. And if you're looking to shop for tangible products, the tablet has one-click access to Amazon's online store, of course.