Display size is an important spec for people in their 40s and up whose close up vision is not as good as it used to be. (My wife has had cataract surgery and can't read small print without reading glasses)
This is one of the most important quoted spec in electronics nowadays. Look at GPSes and cameras. Display size is always prominently advertised on them. I'm surprised that no cyclometers that I've looked at state this information. "Extra large display" does not tell me anything.

I just ordered two Planet Bike Protege 9.0 cyclometers. It was the temperature, price and (possibly) large multiline display that sold me.

Update - I just got a very fast reply from an inquiry to Planet Bike:
"The screen on our computers is 1 inch wide by 1.5 inches tall.the numbers on the top line are 6mm tall which is as big as I've seen on a cyclometer. "
(6mm is about 1/4")
If anyone here is affiliated with any manufacturers or reviewing sites or magazines, please pass this on.