The last time I ever plugged in a pair of headphone in to the headphone jack was probably in college. I used to use the Aux cable input from my car a lot, but then I got a new car that was equipped with bluetooth and usb input last year, and the headphone jack was since then, never ever utilized. Therefore, personally the headphone jack is next to useless for me, but I can see how people would miss it. How did people react when MBA/MBP with Retina Display/iMac came out with no CD rom? I think it will just be another CD rom thing, where people kinda go, shoot what the hell is apple thinking? and then after a few months/year everyone's just gonna forget about it because they will be able to get adaptors/new bluetooth technology that compensates the loss of sound quality/other alternatives. What you think?