The Amazon tablet myth has grown to include the idea that Amazon would release a tablet in order to have a platform to sell content (video, MP3, ebook). My problem with that is simple: Amazon have never done that before, so what makes you think they're going to do it now?
Amazon has sold video since 2006, and they never released a media device. Instead, they partnered with other hardware companies (Tivo and Archos, for example). Amazon has also sold MP3 since 2007, and they never released their own MP3 player. Instead, their content runs on virtually everything.
Folks, do you realize how easy it would have been to release a set top box so it could sell more video? Instead Amazon partnered with Roku, Logitech, Tivo, and Sony. I bet you dollars to donuts that either Sony or Logitech would have been happy to help Amazon make a set top box media player. Amazon could have used the A-box to sell MP3 and video, but they didn't.
Archos has been capable of making a media player for Amazon since (at least) 2007, and yet they never did. it would have been a decent device, too. I have an old Archos media player from about that time and I can say that they make decent hardware. The Archos 705 even had Wifi, so it met all the requirement you'd expect for a connected media player.
But Archos never made one for Amazon.