In the video, O'Leary talks about his reluctance to give up his QWERTY keyboard BlackBerry (we're assuming a Bold 9900), and adopt BlackBerry's "new technology," BlackBerry 10. After seeing his friend rocking the Z10, and getting a demo of how the keyboard worked, he was convinced.
"Guess what? I dumped my iPhone yesterday," O'Leary said. He then added about the Z10, "Right now, [...] this is the best technology on the market today until somebody else surpasses it. I've switched. I always have the best, you know that."
This is exactly what BlackBerry needs, VIP-style people talking about their product and raving about it. I have no doubt we will continue to see more high profile celebrities and businessmen come out and give BlackBerry a great shout out. Word of mouth advertising is something no commercial can replace.