5 Things Microsoft's Cortana Needs To Do To Take On Siri

Interestingly, there is a Windows Phone App that does all of these things....

http://www.windowsphone.com/en-us/store/app/plexivoice/9c09f...

Microsoft definitely has an advantage over third party apps. They make it nearly impossible to edit a calendar item, and their web API's won't give you a contacts phone number.