Opt into Big Picture mode's beta and you can test out an updated, improved version of it.
Big Picture mode, which lets you play Steam games on your television, is being upgraded in anticipation of the November 10 arrival of Steam Machines.
Shacknews are reporting that Big Picture now has a new Library option, and will point you towards games that you haven't played yet, encouraging you to give them a shot.
There's also a new Recent tab, which will order the games you've recently played and downloaded, making it easier to jump right back into them.
This is currently in beta, but hopefully the update will get a wider release soon.
Valve has more information about Big Picture mode on the Steam support website.