Thats right. I agree that sensitivity levels are not something most people can't live without. However, when the market has stalled and you need to sell new ipads, mere new processor can't deliver new sales (PC market shrinking is a good example even though they added touch via Windows 8).
To become true content production houses, iPads have enough computing power, convenience and battery life to deliver it. However, they would need to have things like precision (thats why mouse and cursor), artistic ability (sensitivity levels) and some kind of easy accessory addition (via Lighting or USB). Probably Lighting is more, of course, ready for that.
The OS for iPads then should be improved to accomodate sensitivity levels of pressure; it can be also useful for games like FIFA (which I play regularly) on which you can vary the pressure levels to deliver different strength to the ball touch (or shots) or jumps. As you see, measuring pressure can be very much opening a floodgate for new types of software and games, exactly what iPads really needs to re-accelerate their growth.
I don't think its very difficult from technical and software point of view. MS Surface has it (1024 levels); Wacom has 2048 levels for its Intuis Creative Pen for iPad; but because they provide the pressure senstivity in the pen, rather than tablet, the pen costs 150 dollars. System wide pressure sensitivity would allow iPads to use any stylus with pressure sensitive settings.
haha. He's waiting to be Tim Cook's successor since he knows how to run a tech company so well, that he knows what could get inside an iPad Mini 3, better than what Apple do.....
