Here is an interesting comparison of Cortana over the course of the 4 halo games:
PTesh adds his dulcet prepubescent tones over the top of one of the new trailers for weapons...
Try upgrading your browser to Google chrome (you wont regret it). There is probably an IE...
Halo 4 due to be released November 6th 2012
Hooray for matcher chief. Hopefully 343 will put some eggs in there so we can stay in business.