From Apple’s press release for the iMac Pro:

In addition to the new iMac Pro, Apple is working on a completely redesigned, next-generation Mac Pro architected for pro customers who need the highest-end, high-throughput system in a modular design, as well as a new high-end pro display.

I would normally assume that everyone had seen this already, but my busy week has reminded me that not everyone follows this stuff so closely.

But it’s also worth mentioning that, in an alternate timeline where Apple didn’t have their change of heart, which resulted in the roundtable meeting in April, this might have been Apple’s replacement for the Mac Pro.