As I mentioned in the
thread in the Apple forum, this makes more sense to me now.
I was very happy to find out that my Apple Air 2 was going to have triple core, an updated GPU, and 2 GB RAM. And I liked it so much that a year later when there was a $100 off sale, I bought a second one, even before the 2015 iPad announcement (although hedging my bets by keeping the seal unbroken until after the announcement).
However, it always struck me that a triple-core A8X with a large die size was probably overbuilt for the iPad Air 2. I didn't know why it was built like that, and thought perhaps Apple was playing the specsmanship game against its competitors even though it traditionally didn't think it needed to do that.
Now that I know it was actually built for the iPad Pro, that explains things.
BTW, it seems the best iPads so far have been the ones with the biggest dies, so perhaps Apple should stick to that.

Coincidentally, those have been the iPads I've bought. I got the A5X in the iPad 2 way back when, and now own two of the A8X in the iPad Air 2.
Could be obfuscation before
huge announcement ()

.
