Just bought a top-of-the-line 27" iMac with all the latest technology. Paid a lot of money. Happy? Yes . . . . until I learned recently that USB-C will quickly obsolete my Thunderbolt and USB3.0 ports. With USB-C expected to be ubiquitous on Mac and PC we can expect a plethora of devices using this interface. Current Mac users will be locked out of this set of devices. This is disappointing and frustrating. I actually wrote an email to Tim Cook (Who knows if he will ever see it!) requesting that Apple consider producing a "Thunderbolt > USB-C" cable. I understand that it might not be possible to recreate all of the USB-C functionality, but such a cable would at least provide the physical interface for current Mac users. Am I alone in this position? Or, am I missing something?