true it's all guess work, but apple can control where it goes and how quick it gets there. google has to work with all of these manufacturers, which will slow them down a bit. if the manufacturers are still making profits from 32bit hardware they won't be as motivated to produced more costly 64bit hardware that's going to cut into their profit margin. let's face it, a vast majority of smartphone users aren't tech savvy and aren't pounding on the door asking for 64bit this, 64bit that. even the tech blogs are saying "meh" and "so what" to apple's 64bit announcement.+dav M
64bit can use up to 4gigs and beyond where as 32bit can only use up to 4gigs, in the case of iphone 5c and below.