The demo looks really good, but it also looks really staged so, who knows? The idea of hacking with your cellphone, including stuff like traffic lights, honestly isn't bad at all. It might not be risky or boldy, but you certainly can't deny it looks interesting.
I dunno, after all the wowed posts here I expected something better than blasting a guys phone because he can't be arsed to just walk past him (tho thinking back, I realise the bouncer(?) wouldn't have let him in anyway I guess?), and cause a traffic accident and deaths because he can't wait for the guy who was coming to "meet" him in the first place to arrive.
So yeah, interesting, I just don't get all the wows.