Here's a Tweet from Nokia today to a person that asked about getting Cortana on the Icon: "Well Denim is rolling out in q4, 2014 and the Icon is one of the few to get the full benefits of that update so soon!
" So Denim will come out in a month or two, but I suspect the Icon will be one of the devices that gets it first. While we got stiffed on Cyan, we'll probably be ahead of the game on Denim. At least that's how I'm reading it. Then we'll get Denim for about a year and the life cycle of our Icons will come to an end just in time to wait for Corduroy or perhaps Polyester.