Siri has more power than ever
In iOS 7, you can use Siri to do a number of things that were previously not possible. For instance, you can use Siri to toggle various system-wide settings, such as Wi-Fi, screen brightness, and Bluetooth (i.e "Siri, turn on Wi-FI"). You can also use Siri to create stations in iTunes Radio and search sites like Twitter and Wikipedia. You can even use Siri to find out what's trending on Twitter.