Pretty much nothing. In the eyes of the law, this guy didnt sign a contract, he didnt pay for anything up front (obviously) and he was never seen, therefore no witnesses. Im guessing the way the law will look at it is that the Cherry guys just opened some of their own boxes on a webcam with people watching. The fact nothing was paid for and they never left Cherry's possession means that they are still Cherry's cards.
It sucks that this happens, but this should be a lesson for anyone out there doing this. I was always under the assumption that you pay before you bust. What if you havent paid for a $120 box yet, they bust it and you get **** cards... are you really going to want to pay for it? I know the majority of us would pay for it regardless, but there is always people out there that like to rip people off.