Now Playing: 12-16-11 Marketplace Tech Report

At first glance, Facebook's Timeline feature just seems to be another in a long series of redesign elements. But upon examination, it reveals itself to be a fundamental shift in how you present yourself to the world. Also, we have a robot roundup, including a robot who can keep you on your diet and exercise plan, a robot who can let you forget the plan while it makes you sandwiches, and a robot that resembles a spider and rappel on a web and do cartwheels.