Not only that, but Siri acts as a layer of indirection between you and the search engine. She can decide which search engine to use based on the query. That ope

Not only that, but Siri acts as a layer of indirection between you and the search engine. She can decide which search engine to use based on the query. That opens the door for subject-specific search engines to steal chunks of traffic from Google without forcing users use a bunch of different sites and interfaces.