Just demonstrated at WWDC 2013, Siri has had a makeover and an upgrade for the newly announced iOS 7. Now included in Siri is Bing results, Wikipedia, Twitter, and Siri can control more of the device than ever before. It can adjust your screen brightness, turn on and off Bluetooth, and more besides. Siri also has a new male and female voice, and has had a UI overhaul in fitting with the rest of iOS 7.