The guy sitting in front of me at the Swiss @-print conference today spent some time browsing through articles on his iPhone when the speaker’s topic didn’t interest him.
That’s a cropped version of a zoomed image I took with my 3GS camera, and it’s rather grainy. I don’t know if you can see just how small the text was on his screen, but it was pretty small. From what I could see, I’d guess he had about a third of an A4 page displayed horizontally on the iPhone screen. In that case, the text would have been about 60% of its printed size at best, and most scientific journals aren’t known for their large easy-to-read type.
Since I got my first iPhone, my nearsightedness, which had stabilized over the past years, seems to be getting worse again. I even had to get reading glasses. I know a few other people who have complained of the same thing since they’ve gotten an iPhone, too. It would be interesting to know if we’re part of a larger trend.