Actually, iMessage is a great example of Apple taking a succesful third-party concept and making it their own in the OS, like Dashboard (Konfabulator) before, t

Actually, iMessage is a great example of Apple taking a succesful third-party concept and making it their own in the OS, like Dashboard (Konfabulator) before, they now do the same to WhatsApp, only this is iOS only and Whatsapp is crossplatform.