IMO (apparently I must add this before the rest of my comments
)...
Amazon is not going to abandon e-ink (if they do it would be for something similar, but I doubt they would go exclusively to LCD screens for e-readers). We will probably see new e-ink Kindles along with the rumored tablets. If Amazon does add a touch Kindle, I would be very surprised if they don't overhaul the UI to be touch friendly. The current UI is made for the 4-point navigation, and IMO would not work as well and would be a waste with touch tech. So, I would be more excited about the possible UI enhancements a touch screen could bring us.