Visitors at select Boston-area parks will soon be able to sit, relax, and charge their mobile devices. Soofa is the first step into smart urban furniture, Changing Environments CEO and Soofa co-inventor Sandra Richter says in a statement. The possibilities to update the city for the mobile generation are endless and long overdue. The company is a startup spun off from MIT Media Lab, a research laboratory known for unique innovations like shapeshifting furniture and a vest that allows its wearer to feel a books emotions.