$40 for a light, and better contrast, and better resolution. 800×600 was getting pretty long in the tooth; cramming 1024×768 into the same space may not sound like much, but I'm looking forward to the higher pixel density for sure.
And faster page turn speed. None of it is worth it for what Amazon is trying to do with books: exclusivity deals etc. are going to turn books into cable tv and Amazon is leading the charge.
