Having a quality watch to track your runs is important to runners - of all levels. You want to be able to accurately track your time and/or distance and/or speed. (Some runners do some workouts only for time and others do all their runs for distance.) Sports watches are also made that feature a heart rate monitor, also.
As technology grows so does the methods of timekeeping. Most people own cell phones which are not only communication devices but also contain clocks as well. Blackberries also have clocks inside of them as do many of the other electronic gadgets that people carry around on a regular basis.
During the day, it's easy to glance at your watch and see what time it is. At night or when encased in darkness, seeing the time becomes a lot more challenging. Today's watches may have a button to press that will make the face light up so that the time can be seen but not all of them do. This means you have to find a light source to that will enable you to view the time.