Anyone who has dropped out to this point never wanted it to begin with. Lots of people just jumped on the band wagon, some wanted to flip, some knew they weren't going to buy but put money down just in case etc.
I can say this because at this moment, the deposits aren't final and we are far from having all the information. Above what was given at expo, we have very little aditional info.
If you were serious, there is absolutely no reason to cancel now. There are a couple exceptions, like people who bought originals, but for the most part, with no money locked it and lots of info still to come, the time to cancel hasn't happened yet.