At that price point, the stylus

encil should be included.
For all the "jobs said stylus is a failure" crowd, I agree 100% when talking about UI. This isn't designed for that. The stylus (and to some extent, the iPad Pro itself) is aimed squarely at the creative market to replace products like the Adonit Jot Touch. The pixel precision accuracy of the stylus would be handy as hell for artists/illustrators/designers/architects/etc.
I could see these being huge in the medical field. A buddy who's family owns 3 pediatric clinics was searching for exactly this and WANTED to use iPads last year but they were just too small. They ended up with 13" Lenovo tablet/laptop hybrids for their staff. He commented after the launch that they would likely be moving to these after next upgrade cycle in 2-3 years. I suspect that's going to be somewhat commonplace.
I think this is one case where the "pro" is not just a moniker. I think this is intended to be somewhat of a niche/cache product Primarily designed for the professional market, and is priced accordingly.
My .02