Okay so it's not like you're going to go home with it, but they are picking one grand prize winner a day to receive a free fucking X-Box One. Regardless of what you think of their PR bumbling, that's pretty cool. In all my years of "conning" no one held a contest for a free new console. The details are below and be sure to bring you Comic Con badge to enter. At the very least you can play some of the new games which seems pretty kick ass to me.
If you're attending the event in San Diego, bring your badge to the Manchester Room in the Grand Hyatt Hotel, this is Xbox One HQ. One winner will be chosen each day at random and you'll be able to enter once per day.