I do put the radio on but with this aerobic training I split it into 5k sections and concentrate on maintaining steady pace, power and heart rate - and that gives me something to focus on and the time passes quite well. Going hard for an hour is a different matter completely.
These figures only apply on the Wattbike, of course, real cycling is much harder and average speeds are more like 17 mph and heart rate 135. I assume the Wattbike is set up to emulate track cycling in a velodrome. It's a good tool because it feels like a real bike but is self-contained, better than a turbo trainer although the latest computerised ones let you race your mates on the internet over classic cycling routes...
PS I invested heavily in a super-light road bike and it sure is easier - but only worth about 1 mph on the flat (hills are much better though!)