Predicted by a 3 year old comic: https://pbs.twimg.com/media/COenroJWEAAjLoi.jpg:large
The weird part for me is that everyone I know who tried an iPad for getting work done (ie: PROfessionals) gave up on it. iOS is simply not geared towards productivity nor content creation, it is a consumption device. The surface pro is the exact opposite, it is a machine that works for getting shit done on the go (for some people, not all obviously).
I would still be using my iPad for development, except for the fact that I found the 9.5" screen to be just too limiting. The other reason was that all the bluetooth keyboards require a separate cable for charging, which I hate.
The larger screen and the fact that they keyboard cover is powered by the tablet itself makes this super compelling.
Not for my "every day development" machine, but for use on road trips or so I can go spend some time in the middle of the woods without a full-sized laptop in tow.
Also, the updated screen tech for the pencil hopefully means I don't need to buy a separate Wacom tablet.