Microsoft's latest commercial takes a dig at iPhone's pretty face, Siri and the single speaker of iPhone. It shows how Cortana makes HTC One for Windows more than a pretty face. This gets indeed funny when Siri says "iPhone has only one speaker and she's sitting on it".
A series of interesting videos have been posted by Microsoft which lets you get up-close and persona with Cortana, your upcoming personal assistant, voiced by Jen Taylor. There are shades of rivalry as well, a some of these videos compare Siri with Cortana, and then you can also learn about