I want to buy a rMBP but with such a big investment I want to make sure I buy it at the right time. I'm not so much worried about Intel speed increase. What I am more worried about is a completely new feature coming to the rMBP. for example, what if Apple decides to add Touch ID on the rMBP. Does anyone think that touch id would be coming to the rMBP anytime soon? or should I pull the trigger and buy it now. Is it worth waiting at least till they release Yosemite officially? Maybe there will be some update while they are giving the October announcement?