To be fair the current voice stuff on iphone isn't that great. I'm expecting this to be an incremental improvement, but not mind blowing. Quite happy to see how it goes though.
One more time for those not paying attention:
Siri is NOT voice recognition! Siri is an AI that happens to use voice recognition.
The current iPhone voice recognition will be replaced by Nuance, the company that produces the Dragon line of products. And the current voice recognition Nuance is doing is impressive. It's not 100%, but better than any voice recognition I've ever used.