I wouldn't bet that it will be released this year, everything seems to be delayed - and the Mac Pro doesn't get priority for Apples attention in these more difficult times. I still think a W3300 Mac Pro has a good change at an eventual release, though.
The W-3300 is already released.
Can order them now ( how long to ship may not be immediate )
Accelerate rendering, simulation, and other compute applications with a 28-core Intel® Xeon® W processor and up to four professional GPUs.
www.boxx.com
so if Apple doesn't ship in volume by November-December that would be a substantive delay. If announce in Dec and most orders don't ship until January that would be a substantive delay from now also.
They just updated the MPX, which likely made 99% of Mac Pro users happy already. The CPU upgrade is only OK, if most Mac Pro users are video editors or some 3D work, the faster Xeons aren't really a huge difference for that workflow.
Two major problems here. The primary target audience for an updated Mac Pro is not the Mac Pro 2019 users. The Mac Pro 2008-2013 users can't use a MPX module. So just a new MPX module doesn't buy them much of value.
There was probably something about the Mac Pro 2019 they didn't sign off on.
1. Price is probably one. The > 16 core options had excessive Intel " > 1TB " RAM tax on them in the $3K range and Apple slapped their tax on top. A major change that the Xeon W-3300 series brings is more price sanity at high core counts.
a W-3300 change would allow Apple to make some substantial pricing changes. Some MP users don't have deep access to spending other people's money. The price of the system matters.
2. 32 versus 28 cores is 4 more cores. At top end CPU workloads that makes a difference even if the indiividual bump is +5-10% over the W-3200 , but that isn't the primary point . For older Mac Pro the gap is much , much larger between those and the newer ones.
The W3300 is a nice upgrade since it has PCIE Gen 4, etc - but for the user base of the Mac Pro, it's just an incremental bump. Even a W6800x Duo vs a Vega ii Duo is just a small bump in performance, very close numbers for that most part.
How much is the W6800X choked with immature drivers and the PCI-e bus running at "half speed"? There is a substantive mismatch between even the Vega cards and the MP 2019 for workloads that push large data workloads across the data bus as a steady rate.
The Apple Silicon Mac Pro is really far away, too - that will likely be the last one to come.
Depends upon what "really far" means. The "half sized" Mac Pro and the "bigger screen" iMac update probably won't be that far apart if they use just about the same SoC. Spring '22 isn't "really far' in the big picture. For the impatient perhaps it is.