I think there's another important thing to note, and that is that many comics go out of print, and if we don't digitize them, we lose some true treasure of comicbooks as a result.
I think a lot of people pirated comics for this reason. Especially outside the U.S.
That said, having all my comics on a digital device or in the cloud instead of a row on my shelf just feels weird. But the upside is that owning content digitally means that the publishers can update it constantly, as some did with retina-resolution comics.