With the right hardware setup, you may no longer need to sit in front of your gaming machine. With a PlayStation Vita, you can play PS4 anywhere in your house. With an Nvidia Shield, you can do the same with a Windows gaming PC. But what if you don't want to buy a multiple-hundred dollar handheld game system to play Tomb Raider in bed? Valve is building a game streaming solution right into its free Steam game platform, so you can sling games from your beefy desktop PC to laptops as thin as a MacBook Air. Late last week, Valve invited a host of new users into the Steam In-Home Streaming beta, and we made it in. Read on for our first impressions.