Just a couple of years ago, Mohamed El-Erian was one of the most powerful financiers in the world, overseeing nearly $2 trillion as CEO of Pimco. Now, he’s, uh... well, he has a Fitbit?

Fitness measurement gadget maker Fitbit has surged a full 50% in its stock market debut today, meaning Fitbit is now a $6 billion company that, ideally, would not exist.

Yesterday Tumblr founder David Karp wrote that he and his girlfriend were going to try wearing Fitbits during sex so they could calculate their physical exertion. Get ready for the brave new world of truly constant life-updating.