So we didn't get the multitouch iMac today that some might have been hoping for, but Steve Jobs did drop one tasty hint about the oft-rumored technology. During the Q&A portion of today's keynote, somebody referred the iPhone's multitouch sensing and asked, "what about for the Mac?" Steve, surprisingly, replied. "Makes sense for the iPhone, not sure it makes sense in the Mac. Classify that as a research project." So there you have it, straight from the horse's mouth: Apple is at least considering letting you get all touchy touchy with your Mac's screen, and you can't ask for much more than that, right?
AppleiMac 27-inch with Retina 5K display (late 2014)