Your point of out of print books is very true, and for another reason. Unless I can hunt down a 50th printing of the first appearance of Spider Man or the first Captain America, odds are I would never get to read them. Having a digital copy for $1.99 and seconds away is a very comforting thought.
The other upside of having all you comics in the cloud and accessible by one device is that you don't end up with 50 long boxes of comics that you have to store.
I do still buy some comics in print, those that I find truly beautiful, or when I find one in a comic book store that I want to support. And it is important to note that Comixology doesn't have every comic book ever, there is still a huge percentage of books that haven't made there way to the digital space.
The other upside of having all you comics in the cloud and accessible by one device is that you don't end up with 50 long boxes of comics that you have to store.
I do still buy some comics in print, those that I find truly beautiful, or when I find one in a comic book store that I want to support. And it is important to note that Comixology doesn't have every comic book ever, there is still a huge percentage of books that haven't made there way to the digital space.