As far as I know, there hasn't been any definite information on the difference between the Kindle stack and the Android 2.1 stack. I would be very surprised if

As far as I know, there hasn't been any definite information on the difference between the Kindle stack and the Android 2.1 stack. I would be very surprised if Amazon hasn't done some downstream merging or porting of the features you mentioned, or been working on similar speed and performance improvements on their own. At this point, Amazon knows that they need a fast, performant tablet in order to do well in the market. Historically speaking, they know that moving first (into the non-premium tablet market) will not guarantee success. Quality does. In regards to the tablet market, I'm not sure about 1-2 billion tablet customers. That's 1-2 out of every seven people owning a tablet, which is probably not realistic. I can see an easy 500 million customer in 5 years, which is a very conservative estimate. Whether the trend will continue past 1 billion, though, isn't really predictable right now. If tablet do end up becoming the computers for non-techies, though, then your prediction will probably hold, though it may be more like 15 years.