Tom Snyder: Mobile devices deliver our data, our 'proxy selves,' whether we like it or not
It is no coincidence that when you get home from the game, the first commercial delivered to you is to buy a jersey for the team you just watched play. Your phone (or your smartwatch) was an excellent proxy for your location by nature of its electronic relationships with all the fixed-location gear it wirelessly shook hands with during the day.
Source: wraltechwire.com