from the Verge..
http://www.theverge.com/2013/10/30/5046894/huge-xbox-one-what-why
Microsoft has revealed its latest product prop: a ridiculously large Xbox One in Vancouver. Straight reports that the console is 40 feet long and 20 feet wide, and that the prop will "unlock" if enough people "pledge" their gamertags — hinting that the next-generation monument could be preparing for some sort of human sacrifice.
EDIT... probably related to this http://www.xbox.com/en-ca/onesource