My spouse has poor vision; the kindle will read to her. (It struggles with equations in a physics text, but otherwise does well.) When my eyes are dilated at the doctor's office, I can change the font size and still read. When it is starting to get dark, I can change the font size and still read comfortably. It is actually pretty comfortable to hold, and I didn't have as much trouble with the touch screen as I had anticipated.
I read a lot of fanfiction, off and on, and the kindle is certainly more environmentally friendly than reading on the computer or printing out stories.
The ability to change the font size would be the
only reason I would ever get one of these gizmos. There are some websites I visit regularly where I have the font size set for what's comfortable for me - thank goodness fanfiction.net is one that allows this.
CKS, what kind of fanfic do you read?

I read a lot of Star Trek, some Highlander, some Tudors, and just finished a 26-chapter novel about the Borgias. This is all on fanfiction.net, but I also have a growing collection of physical fanzines - mostly Star Trek (Classic only; I don't care for most of the Next Gen stuff), some Highlander, Doctor Who, and crossovers.
And speaking of the physical fanzines - some really excellent Star Trek fanfic is available online that used to be only available in physical form, but part of the appeal of the physical fanzines is the artwork. Most of the time when the stories are re-posted online, the artwork isn't.
Tomorrow there is a new series premiering on TV, called
Revolution. The basic premise is that one day, the electricity stops working, all over the planet. No electricity, no batteries, therefore no computers, cell phones, etc. Personally, I'd be devastated if my reading and reference library - which is extensive, considering that I've been a book collector for over 40 years (yes, I still occasionally pick up and read a few of my childhood books, and still have the very first book I can remember) - were lost forever.
And with a physical book, the company that sold it to you can't electronically grab it back.