So maybe Apple is working on an all-new design and it's just taking time to prepare that design for mass production. Or they intend to kill it when they announce a new "iMac Pro" with a six/eight-core i7 and workstation class GPUs.
No, just NO. Trucks need a Xeon. Maya @ 4K needs a Xeon ( if not two ). Offering something less powerful than the current MacPro is a slap in the face. And based on recent and current decisions by Apple, that's what i'm expecting. They have been falsely and arbitrarily re-defining what a Pro needs for years now.
An i7 iMac Pro will be as "Pro" as a 2016 Macbook "Pro", or Final Cut "Pro" X. If they try to pull that ( bleep ), it's 100% OVER for power users. Full Defection. Then Cook and Ive can finally stop making computers, then they can focus their attention on important matters. Like making stuff thinner.