I love the Lion King movie, but this digital version suffers from horrible interlacing artifacts, tolerable (barely) on computer but completely unwatchable on 65" plasma. Any fast, high-contrast motion results in a ghost image with horizontal stripes, like a old-school VHS rip using one of those USB converters! Shame on Disney and Amazon for botching this landmark partnership - for $20 I expected better. I really hope this is an issue with the initial rollout that can be fixed quickly, my family was so excited to finally be able to watch this classic title in HD on Amazon Video.
I have tried on Amazon FireTV, Mac OS X (using Chrome HTML5 Player) and on Windows (using Silverlight) and they all exhibit these artifacts, though it is less distracting on the computer because the screen is smaller. There is something wrong with the video encoding itself because the trailer looks perfect, and the player can be paused on an artifact frame. You can even see it in the "seek preview" window in the HTML5 player.
We have 1GB/s FiOS internet, so all of the devices are streaming at the highest quality settings. If I force the PC player to stream at the worst quality, it is less noticeable because the whole picture is blurrier -- but this defeats the whole point of HDTV! If you have slower internet it might not be an issue for you, but buy this at your own risk!