Is there anyone who is really looking at the full size iPad and saying "Man, if this thing was only 30% bigger and more uncomfortable to use for extended periods..."
I'm guessing not. Anyone thought that a HiDPI 12" panel might be headed for MacBook Air?
Bigger? YES. Uncomfortable? No. But I don't think an iPad that big is meant to be held for extended periods. It would better serve as a touch-based, laptop replacement. Larger visible area when typing, better apps for music control (mixers, sound enhancement, etc), and perhaps even an artist tool.
I would definitely consider one.