I'm guessing it looks just like an iPad 2 would. It may seem to look awful, but it doesn't. I remember when apps started updating for the iPhone 4. The built-in apps had icons that were upgraded, but some took a while. Those lagging behind looked AWFUL, but it was just by comparison.
The good news for people like me is Kindle updated yesterday, which is kinda huge. I just hope the magazines I subscribe to update their future issues. I doubt the older ones will get changed, but maybe we'll get lucky.