I want the same and am ready for a new iMac too. But I'm afraid I've to look elsewhere because even the slightest bit of hope Apple seems to ruin these daysI want this chunky 10.9" iPad Pro, and I want it to have an overhauled version of iOS that is custom tailored for professionals with beastly hardware to match. I want something that would be an excellent complement to a new iMac, with first party support to use it as an external display for drawing on the Mac as well as a Touch Bar. There are apps that help do this, but I think if Apple tried it, they could do a better job of tightly integrating the two.