I guess they could add features to the iPhone, since its display is not retina yet (at least I haven't heard them say it on their website, and they like to boast retina tech). Anyways... in terms of the macbook pro, iPad, and iMac, I don't see what else they can do to improve it. Technology is being pushed to its limits. Things can only get so thin and so light. You can only pack so-much ram into a computer. I don't see how they can add anything to the next generations of any of these devices.