Sonys Project Morpheus has only been public for a few months, and without the wealth of community projects that Oculus has, its demos have been thin. Today, though, the company finally showed off something undeniably fun. The Street Luge tech demo is like a roller coaster that you control, dodging and turning by tilting the headset. If youve got a low couch or beanbag chair, which Sony kindly provided for us, the movement feels natural, though you quickly realize that you dont need to shift your entire body weight and just start twitching your head. …