In a keynote at its Worldwide Developers Conference, Apple CEO Steve Jobs unveiled the iPhone 4, the prototype of which was featured on Gizmodo after it was left at a bar by an Apple employee. Among its features are a thinner frame, a new camera that can record HD video and increases resolution to 5 megapixels, and video chatting capabilities. Jobs also used the keynote to announce a number of app announcements, including those for Netflix, Zynga's Farmville, and Guitar Hero from Activision.