I was literally just coming to start a thread about this myself!
I am setting up my shiny new Surface Pro 3 (yes 3 not 4, I always run a version or so behind

) and the fonts are tiny.
I can set the display size on the surface bigger, but the next size up is industrial sized, no halfway. I'm going to have to remember to take reading glasses with me portable!
However, I also setup Minos contest logger for pure contesting (I like Log4OM for all but contest logging) and that has the ability to choose font and font size. Don't know if you have seen this so I thought I would mention it.
Suggestion above would probably be better still, just a few size choices if possible.