Obviously, a riMac is not needed to program with Xcode, but what is the experience like compared to previous iMacs ? Snappier, more real estate ? Anything else different ?
Same as going from a 1280x1024 to 2560x1600 display, you get that much more real estate. Very handy indeed for editing/coding. I use Xcode in both 3200x and 5120x modes, it's superb.