Apple will only release a second "Pro" model when they can make significant advancements over the previous one. Likely we will see a Pro then Air (then Pro...) tick tock cycle for a while as the technology develops
Seems like testing on guinea pigs who bought the expensive dev kit is paying off. Software and slimmer model are a good idea to popularize.
Id like to stick with my current AVP for at least 5 years rather than frothing for an AVP 2 to fomo over.