Tired? Hungry? Lonely? I have a solution for you! Take a nap, grab a sandwich and sign up for Steam Broadcasting!
If you and a friend sign up into the beta, you can watch each other play videogames all day long over the intertubes. How's that for a feature?
Scared about privacy? Have no fear, you can choose who can view your stream, whether it be invite only, friends only, or the whole wide world.