Steam will support game sharing?

Steam may soon be introducing the ability to share games with friends. There are three lines of code found in the latest Steam client beta make reference to something called a shared game library.

The lines are:

     

 - "SteamUI_JoinDialog_SharedLicense_Title" "Shared game library"

 - "SteamUI_JoinDialog_SharedLicenseLocked_OwnerText" "Just so you know, your games are currently in use by %borrower%. Playing now will send %borrower% a notice that it's time to quit."

 - "SteamUI_JoinDialog_SharedLicenseLocked_BorrowerText" "This shared game is currently unavailable. Please try again later or buy this game for your own library."

From the code, it seems like you'll be able to let other Steam users play your games when you're not using them, but they'll then be told to quit should you wish to play.

Do you think this is a good thing? Let me know in the comments below!