The document discusses how user interfaces are breaking through into the real world. It introduces Twilio, a company that makes it easy to integrate voice, VoIP, and text messaging into business processes. Twilio allows for immediate interactions with customers via SMS with high open rates. It also enables connecting humans to humans by letting people call businesses directly. Additionally, Twilio can enhance user security by using mobile phones for two-factor authentication. The overall message is that software like Twilio's is using technologies like voice and SMS to create interactions in the real world.