But following your example, Amazon sells "Learning Python" 2009 paperback for $34.64, while the Kindle /license/ version for the same edition is $25.75! And note the paperback version includes shipping costs. Paying 3/4 of the price for just a license on a single device is ridiculous, IMHO.
Every single book I've purchased for my Kindle will work on my android phone, my Windows VM, and my Kindle. If I had an iPhone/iPad/iPod I could read on those as well. And they all sync, which means I am quite literally always have dozens of books with me. If I run down to the store and grab nothing more than my keys, phone, and wallet, I can catch up with my Instapaper queue while I wait on line.
If I go on a short weekend trip, I don't have to use up a fifth of my luggage on books so that I can have a book for the plane ride there and another for the ride back. If I'm stuck in an airport with nothing to read, I can jump online and download any one of over 600,000 titles (and that's just from Amazon! I also have the option of grabbing a free book from manybooks on my phone and emailing it to my kindle account.) If you want to talk about ridiculous pricing, go pay fucking $29.95 for a new hardcover in an airport and try not to appreciate having greater convenience and selection at under half the price in the space of half of a magazine in your bag.
I've been accused of being minimalist or utilitarian, and I can't wait for the day when I can afford to rebuy all of my hardcovers in an ebook format and dump the lot of them on a local library.
You'll pay quite a bit more, though. $39.99 for the ebook, compared to $54.99 for print.