Because of the initial low pixel density it'd make sense to have a billboard sized screen, which would solve that issue. There's no reason that you'd need the stereo disparity for reading text.

In practice, anything that's placed 10ft+ away doesn't cause much stress for me although that's probably somewhat personal.

I think within 2-3yrs displays that solve the focal plane issue will be commonplace so this will be a bit of a moot point.