I've seen this debate over and over on MR. Has anyone made a poll with age group/screen preference?
I think that it'll boil down to some with a real medical need and others with just a preference. And 100,000 opinions from 1,000 people, of course.
For me though, I've used computers from before VGA days and now have two large LCD monitors. I've read a lot on all of them, but full ebooks mostly on the LCDs. At 60 I have no problems reading from a monitor even with poor eyesight.