The Staples sale got me to give this some serious thought this weekend and, in short, that is where I landed.
The 12.9 is a fantastic consumption machine, and the screen, really nice for reading.
At the same time, some apps are limited, some don't exist and if you need to write code, or mess with a real database, it's not going to happen. The bigger problem is that I couldn't find a case, keyboard and pencil holder combination. I could find two of three but nothing that did all three. I think maybe in a year or two when there are more keyboards we might get somewhere but it's not there yet and they all take a nice lightweight device and basically more than double, even triple, it's weight and size and/or are awkward to use.
And now there's this 12" device, with some added horsepower, that is a very interesting alternative.