Siri’s limits leave room for competitors - Business - The Boston Globe

Looks like Google should have at least the Boston market locked; check the link for an overall voice command market reality check

"You can see the advantage Google has. Say “Red Sox schedule” to Siri, and then try it with Google Now. Siri sees the word “schedule” and asks if you want to make an appointment. But Google understands what sports fans are looking for, so Google Now displays an electronic “card” showing the next scheduled Red Sox game.
Apple says iOS 6 will include a similar feature. But Google Now does more. After I asked about the Red Sox, a game schedule card started to appear every time I ran the software. I no longer have to ask for it; it just happens."

Siri’s limits leave room for competitors - Business - The Boston Globe