Great observation.
I have no interest in squinting at some tiny screen, either. The OldPossum's just low-tech.
The iPad apps (Kindle, Barnes and Noble, iBooks, ect) all have the ability to change the font, the font size as well as the color of the print and the color of the page to virtually anything you want.
I too have the old eyes - so I bump the font size up a notch or two... makes reading without my $3 readers a pure pleasure.
I’ve got the iPad; and have never regretted it for a moment. And, depending upon which model you get, they aren’t that much more (but they ARE more) than the competition. The good news is that while the Kindle/Nook all are basically eBook readers, the iPad is virtually as limitless as your notebook in it’s capabilities.