Ok, the screen of my xperia active is really somewhat tiny.
But duration to destination on the screen would be much better readable also on wider screens, if the time there is cut by the seconds and switch to hh:mm, if there is still more than 60 minutes to go and is cut by the hours to mm:ss, if there still 60 minutes or less to go. As far as I remember, this is the way as commercial software display the remaining time to go. You do not really need to know the remaining seconds, if there is still more than one hour to go.
Anyway this will safe the place of three characters hh: or :ss respectivly and make bigger the remaining characters.