When people said, "the iPad was just a big iPod Touch, and who'd ever want a big iPod touch?" I said, "ME, the uses are very obvious, especially as a Remote Desktop Access device."
The iPad launched, and I was vindicated. The size was perfect (using applications like GoodReader) to crop down normal 8.5x11 documents in PDF format. Once you trimmed out the margins basically all "book" documents become a perfect fit. It was also a usable/portable size to do Remote Desktop work. Easy to manage with one hand to hold, one to use, while standing.
Now the iPad Pro rolls along. I hear rumors of the size and I said, "that's a ridiculously large iPad, who would every want a ridiculously large iPad. It loses all of the portability advantages that the smaller 9.7 inch screen allows for. At this size and price point, 12.9 inches, you'd may as well get a 13" transforming laptop that is a real computer."
We will see if I am vindicated once again.
Seriously, a Surface Pro 3 or the upcoming 4 make so much more sense/value.