I think we'll see an update, but not as soon as we might think.
In the next rev they will need to sort out the USB, come out with a new video card and implement DDR4 ECC.
sort out the USB ? The new C610 series chipset puts USB 3.0 right out of the box. Apple already has a USB 3.0 discrete controller working if somehow they didn't like that one.
If somehow alluding to USB 3.1 then you don't remember how long Apple delayed jumping on the USB 3.0 bandwagon? Apple was a quite slow adopter (like years behind). Apple took the very conservative route of waiting until USB 3.1 made it into the Intel PCH/chipset. USB 3.1 isn't coming to the PCH any time very soon in the mainstream. In the chipset workstation space, ..... well USB 3.0 is just arriving this year. Again no time soon.
USB 3.1 is in conflict with Apple's quick transition to all PCI-e SSDs. 3.1 has additional PCIe lane consumption pressure than 3.0 does ( x2 from x1 ).
Apple really doesn't need to implement DDR4. Apple is going to buy DDR4 devices (CPU that is capable and DIMMs that implement it). All Apple has to do is put the traces on the board from the DDR4 DIMM sockets to the CPU package socket so there is tolerable line noise. It is work, but not rocket science work.
So, not in 2014. Q2/Summer 2015 feels a little more likely.
The only way that specific level of work slides into Summer 2015 is if there is has been nobody working on it for most of 2014. It isn't difficultly.... it is just plain simple nobody working on it. That is less than a years worth of work for a competent design team. Even allowing for a long beta/verification process it is less than a year.
If they skipped Haswell altogether I would not be shocked.
I would not be completely shocked if Apple had pulled practically all R&D resources away from the Mac Pro. It isn't like they haven't done it before. It is a bonehead move but then hanging your EU customers out to dry for almost a year is a bonehead move too.
The nMP has some upgrade issues in terms of thermal. They can't just throw a 140w CPU and an AMD R9 based video card in there and just go with it.
This assertion makes very little sense. The E5 Xeon v3 and AMD GCN 1.1 components are actually substantively better at dynamic power control then the components in the Mac Pro now. If dealing with a limited fixed amount of power envelope is an issue those components are better. Skipping them is goofy. Apple isn't going to put in an overclocked R9 and/or E5 v3. So the max, 'barn burner' AMD R9 limits are just largely FUD.
The current AMD GCN 1.0 cards are an OpenCL dead end. Apparently there are a small set of features missing to fully support OpenCL 2.0. The Mac Pro is in part a 'bet the farm" on OpenCL play. Languising for another year (or so) on something that inhibits the long term OpenCL adoption is beyond goofy.
The CPU alone is not really that compelling.
Again doesn't make any sense because more than just the CPU package is available. This is a tock so the chipset will increment. AMD and Nvidia have already announced in process of releasing new GPUs. Only is the alternative universe of this thread is the CPU only changes happening right now.
I have a nMP 6c, a 4930k and a 3770k and I'm not thinking about replacing any of the computers this year.
Apple isn't trying to sell any updated Mac Pro to anyone who has just purchased on in the last 9 months. They simply are not. This thread really shouldn't be about excuses as to why someone should replace a less than 14 month old Mac Pro. What you have now is probably way faster than what you had before you upgraded. That is good enough.
If have a "must buy newest shiny" problem then arm flapping about how Hawell (and new GPUs) don't offering anything is just plain outright smoke. You are in denial.
Apple is in no hurry to keep us on the bleeding edge. We'll buy what they make when they make it.
Perhaps Apple is trying to goose demand into every other year. Makes it easier for them to create demand bubbles and hype around launches. At least for those who stick around. It is a probably a pretty effective way to kill off the Mac Pro customer base over the long term though. There are only so many "have to buy the newest shiny" customers out there. Folks who need tools with regular updates are going to go elsewhere.
But there is no technologic basis there. That is just Apple playing some Scrooge McDuck game probably thought up by someone with an M.B.A. degree. There is no engineering there at all.