iPad sales figures are bound to take a leap this quarter. However, retail locations here in NZ have stock of the Pro - we have no Apple Stores here, so this is just your average retailer. If that is replicated around the globe that means Apple supply chain has either been extremely successful or demand for a big iPad was over-estimated somewhat.
So in summary, more than a big iPad, less than a game changer. Apple has re-invented the iPad, which offers a good value proposition for users who fit the iPad Pro template.