In an even nicer twist, when I upgraded to the latest model from my original Kindle, the new one showed up with all of my books already synced so I could literally just open the package, turn it on, and pick up right where I'd left off with the old one. This is pretty small and probably caused more by coincidence based on how the system works than actual intent but it impressed me a lot. I've been a big Kindle user since it came out though.
(FWIW, I use mine to buy books that I previously would've got in paperback form, allowing me to slowly begin the process of rebuilding my physical library by pruning out paperbacks and things I don't care much about in favor of high quality hardbacks.)