The document discusses 6 important unified communications and collaboration (UC&C) concepts: 1) Everything is becoming software-based rather than relying on physical hardware. 2) WebRTC enables real-time communications directly in web browsers without plugins. 3) BYOD and mobility allows any device to be used for UC&C through approaches like SIP. 4) Interoperability is key to connecting different systems, which SIP supports. 5) Consumerization has driven demands for easy-to-use consumer-style UC&C solutions. 6) Cloud delivery of UC&C provides accessibility but also challenges around reliability, security, and business models.