A few months ago Apple had a chat with several major bloggers and they specifically said that the Mac Pro wasn't going anywhere, they were redoing it from scrat

A few months ago Apple had a chat with several major bloggers and they specifically said that the Mac Pro wasn't going anywhere, they were redoing it from scratch. The TLDR is that the GPU workloads didn't materialise the way they thought they would so 2x slightly less powerful GPUs doesn't measure up to a single beefier GPU, and the trash can design really limited them on thermal design, which is why updates on that design stalled. Given that limitation, they decided to redesign the whole thing again, targeting a 2018 release, and they mentioned they were introducing a workstation-grade iMac in the meanwhile. So this seems like it would be _that_ machine.