Here I will demonstrate the basic application of smart watch, the "time" function.
The watches people currently wear did fulfil its basic responsibility of displaying time, some have stopwatch and timer function. Only for those prestigious watches may have compass and GPS built in. For the same reason, the price of those watches are expensive - due to the internal complexity and the difficulty of inserting a compass system. The smart watch is capable of both function with a lower cost - the physical compass system is no longer needed and it is replaced by magnetometer. Also, smart watch is able to change its watch face to enable a wide range of personality of the watch, and display the time elegantly.
The watches people currently wear did fulfil its basic responsibility of displaying time, some have stopwatch and timer function. Only for those prestigious watches may have compass and GPS built in. For the same reason, the price of those watches are expensive - due to the internal complexity and the difficulty of inserting a compass system. The smart watch is capable of both function with a lower cost - the physical compass system is no longer needed and it is replaced by magnetometer. Also, smart watch is able to change its watch face to enable a wide range of personality of the watch, and display the time elegantly.