Why would you call an iPad Air 3 an iPad Pro?
If your new 9.7 inch iPad had all the features of the bigger iPad; pencil support, 4 meg of RAM, super fast processor etc. But, was a couple of mm's thicker or a few grammes heavier to accommodate the battery needed to power these features for ten hours.
Could you have an iPad Air 3 that was heavier or thicker than an iPad Air 2?
I'm thinking no. That wouldn't fly.
Enter the 9.7 inch iPad Pro.
All these new features and only x mm thicker and/or y grammes heavier.
Can't wait for the iPhone Pro.