Mac mini has a M1 SoC, low-to-mid end product...
Rumor has M1 Pro / Max SoCs in a high-end Mac mini (Pro), I would say $3k for M1 Max/32-core GPU/64GB RAM/1TB SSD/10Gb Ethernet...
But for the smaller Mac Pro (aka Mac Pro Cube Gen 3), I would expect at least dual M1 Max SoCs, so starting at $5k (for a dual SoC model, more for the quad SoC model)...?
The G4 cube was the product you want. It failed from a sales perspective, and it failed from an engineering perspective.
The 2013 Cylinder was the product you want. It failed from a sales perspective, and it failed from an enginering perspective.
The definition of insanity is...?
The G4 Cube had the same processors and capabilities as the G4 tower - it was just their pro machine, in a small form factor, and customer reaction was near universal - no one cared that it was smaller. The overwhelming sentiment was "
why isn't this radically cheaper than the tower since it doesn't have all the PCI / drive bay expansion".
Apple thought it would appeal to professionals who valued compactness, it actually sold poorly and overwhelmingly to corporate nobs who wanted decorative desk ornaments.
Same for the trashcan - no one cared that it had 2 "pro" cards (which Apple lied about, because they were gaming cards, but Apple being a customer-gaslighting pathological liar is something you just have to accept). Everyone's attitude was "why isn't this radically cheaper than a slotbox, because it doesn't give me expansion flexibility", and HP had a freaking field day over that in the Z-Series marketing.
Small is not a sales point for professional workstations. Small is a sales point for
inexpensive workstations.
Compactness on a desktop system is something that is only import to people who fetishise compactness, for the sake of compactness, more importantly, it's of absolutely no interest to the market who are interested in paying workstation prices, if it costs them workstation flexibility.
"oh but they can just (kludge)" no one wants to (kludge) for the benefit of a smaller workstation.
The compact, non-expandable, non-upgradable expensive computer is the ultimate edge case. "what if we took the expense of a Mac Pro, but combined it with the built-in obsolescence of the Mac Mini..."