I believe the 2017 models were based on Kaby Lake. I don’t think there’s a definitive answer, but it’s likely the 2019 iMac will use Ice Lake, if Intel ever gets around to using 10nm as they promised. The RAM is something we’re hoping for, but likely won’t happen, as the iMac Pro did not feature user-servicable memory.
I believe the 2017 models were based on Kaby Lake. I don’t think there’s a definitive answer, but it’s likely the 2019 iMac will use Ice Lake, if Intel ever gets around to using 10nm as they promised. The RAM is something we’re hoping for, but likely won’t happen, as the iMac Pro did not feature user-servicable memory.