The largest social network Facebook unveiled its new software, called "Facebook Home," based on Google's Android operating system. "We are not building a phone. We are not building an operating system," Zuckerberg said. "We are building something that is bigger than an app. We want to shift people's focus on phones away from apps and towards content," he added.”I think this can start to be a change in the relationship we have with these computing devices."

To support the new software, HTC CEO Peter Chou announced a new phone, the HTC First, at the event. It will be the first mobile device to come with the software preloaded. The phone will be supported exclusively on the AT&T LTE network.

Facebook Home will also be available for download on a handful of other Android devices that have Jellybean -- Android's latest operating system -- in about a week, Zuckerberg said. The company will release an updated version of Home once every month. But there was no talk of having Home come to Apple's iPhone yet. Facebook Home is designed to rely heavily on images and "very basic gestures," Zuckerberg said.