According to a new survey by Nielsen, the average person spent five hours and third-five minutes on social media sites such as Facebook, Twitter and MySpace.

Given the growth of such as Facebook and Twitter, it’s hardly surprised that we’re spending about 11 minutes/day on social media sites. In fact, that seems low but it does take into account people who, heaven forbid, spend no time using social media.

As the use of social media increases, an interesting question is what are people not going to be doing? Maybe it’s television, although online video viewership is also on the rise. It could be newspapers but online readerships seems to be on the rise. Perhaps it’s book but the rise of eReaders such as the Kindle seem to be giving reading a shot in the arm.

It could be physical activity. According to a recent Canadian Health Measures survey, Canadians are now fatter and less physically fit – something that’s probably true for many Western countries.

The rise of social media could also impact how much time we spend with friends and family. Why socialize in person when you can socialize digitally from the comfort of your couch? Then again, it has been suggested that social media helps people expand their circle of friends. And from what I can tell about the digitally-engaged in Toronto, they socialize in person all the time.

So, what loses if social media wins? Any thoughts?