I use Facebook as a measurement, normally see Facebook filled with unboxing live broadcasts. Search results only return 2016 and older. Even group pages that harvest YouTube videos then post them on Facebook haven't any uploaded any. Sure, the established sites have their previews from their WWDC '17 attendance. There is also limited unboxing videos of the 2017 iMac too, only Endgadget, MacSales.com have posted something. Seems like the 2016 hit the spot for many, the popular YouTubers might not see any major changes to warrant reselling and getting the new ones to do a review. The iPad Pro second gen is a different story, unboxings, harvested YouTube videos hourly. This makes me wonder if Apple might stick to a slower refresh strategy. We might not see the 2018 rev until June next year.