Juli Clover, MacRumors:

Apple has recently been sending out surveys to customers who purchased an iMac Pro, asking them about which features drew them to the pro-level machine and what they like or dislike about the iMac Pro.

And:

Apple regularly sends out surveys of this nature to customers, but this line of questioning on the iMac Pro suggests Apple is perhaps trying to suss out key features that pro-level users want to see in future pro machines, such as the Mac Pro machine that’s in the works.

And:

Phil Schiller and Craig Federighi admitted last year that with the 2013 Mac Pro, Apple designed itself into “a bit of a thermal corner” given the restrictive size of the trash can-shaped Mac Pro and its inability to handle the thermal capacity needed for larger single GPUs.

“A bit of a thermal corner”. Love that turn of phrase. This survey seems a solid sign that Apple is doing their best to learn from their mistakes, hit a home run with next year’s Mac Pro.