A lot has been written about Siri (the new voice activated assistant in the iPhone 4s). I have to say that it works surprisingly well. It has been eerily accurate in properly transcribing my voice, although not quite as perfect in understanding what I am saying.
I just had a 3 message dialog with someone over text messaging using Siri. I never ever would have done that with texting previously but here I went speaking in complete sentences over text messaging and with 100% accurate recognition. I don't know if the other guy was using Siri but if he wasn't he must have been annoyed by how quickly I responded with a full sentence :)
It occurs to me that the average length of text messages might become longer and longer with the advent of services like this. I wonder if that is at least part of the reason that Apple is now bypassing the mobile operators when doing iPhone to iPhone messaging.