I don't know if it could really be considered to be in the dustbin of history. Wolfram Alpha is actually what powers Siri and other services like it. It is what gives her the intelligence. That is a massive accomplishment.
Documentation please. Perhaps SRI originally prototyped on Mathematica, but I do not believe our iPhones are running m scripts in a Mathematica interpreter.
"Siri is a personal assistant application for iOS. The application was first available from the App Store, then came standard on Apple's mobile devices starting with iPhone 4S. Siri uses natural language processing to answer questions and perform actions by delegating requests to an expanding set of web services, including Wolfram|Alpha."