I have a windows phone (love it... well aware I am very much in the minority here, but after having had both iOS and Android I am happy with my choice).
For me, voice recognition automatically launches Cortana (windows phone version of siri I guess you can say). In other words, as long as I have a good phone signal I can call a friend, leave a text message, ask what the weather's like in two days, add a calendar entry and on and on. So basically, everything I can do with voice activation directly on my phone.
I'm still amazed it (almost) always works!
However, I have no idea what i would get if I didn't have a phone connected... going to try tomorrow, and no idea if I am able to directly control anything actually in the car.
