Stephen Hackett:

However, with the iPad Pro — and to a lesser extent, the new Apple TV — Apple's launched a new hardware product without a great first-party example of what people should do with it.

I would argue that Apple didn't launch a great first-party app because they no longer need to launch these with iOS devices. And there is no need to define the iPad Pro, because the people who wanted one, already got it. If you don't get the iPad Pro, then there is no great app which is going to help you get it.