3 things to know about the evolving marketplace:

1. In the future, there may only be one leaf blower per neighborhood. The sharing economy is a bit like the wild west, but that’s what makes it so exciting, says David Pogue.

2. Posh pink or peach daiquiri? Turns out, we can't really tell the difference.  Sheena Iyengar researches the science of choice and says that many choices, like picking the perfect nail polish color, aren’t important enough to warrant our attention.

3. You can't make a pencil.  And in the event that you survive a pandemic or nuclear attack, that's the kind of knowledge that you may need, according to scientist Lewis Dartnell.