I just had that crazy thought. What if Apple was preparing ...an "iMac Touch"! So far, the idea of having a retina display on a screen working at an arm's length distance did not seem too worthwile. Now, what do these retina display ALSO do? Yes, they can be touch-responsive as well. I could envision a 20"+ iMac with a lower swivel standso that it could face up at a greater angle and would need to be closer to the user's eyes, thus the advantage, and the only one I can see, for a large retina display on a forthcoming iMac Touch. Crazy thought...What do you think?