The “Do Engine”

Gary Morgenthaler, Siri's first investor, believes that the digital assistant foreshadows Google's unraveling:

 A million blue links from Google is worth far less than one correct answer from Siri. People don’t really want search engines. Rather, they want “do” engines. They want to get things done. Siri is the precursor to a revolution in search that provides far more intelligence in filtering results. The end goal is a single correct answer. 

Reihan muses:

Google is a large, deep-pocketed, and resilient business enterprise, and we have no reason to believe that Siri represents the beginning of its end. … [T]he same could have been said of Tower Records and Blockbuster.