Satellite positioning can be thrown off in cities, where signals bounce off buildings, leaving you on the wrong street. Newer receivers listen to several satellite systems and multiple signal frequencies at once, which improves accuracy and reliability, especially among tall buildings.
Sharper positioning helps navigation, fitness tracking, delivery and any service that depends on knowing where you are. The better receivers use a little more power and the gains vary with surroundings and hardware, but the move to multi-band, multi-system positioning has quietly made the blue dot on the map more trustworthy than it used to be.