Its not about competing for apple, its about pushing the design envelope. 5 1/2 years is a long time for a consumer device not to be updated.
They never used to wait for people to catch up they would want to improve their own products for the lust factor. Challenge themselves put the competition further down the line. They are the only company capable of this because of the amount they charge and the fans behind them.
The iMac pro feels like the last hurrah for this design.
I don’t know, I would say that Apple has a very well established history that suggests otherwise, at least in the desktop Mac space, with models that go unchanged from a chassis design perspective for many years. That’s the case right now for every desktop Mac product in fact. When they do redesign something, to your point, they go to town on it and strive for the wow factor, but their track record around the frequency of doing that evidently suggests that they don’t seem too concerned about continually putting the competition further down the line.
And from a practical perspective, there is a limit to how many design projects Apple’s design team can reasonably accommodate at once, especially given their famous obsession with detail and Jonny Ive’s reputation for control. And they’ve also been busy designing and building Apple Park in recent years. So naturally I would expect that they take on product redesign projects based on business priorities - which product needs the attention most because revenue is suffering - rather than some sort of lofty academic ambition around making products more lust-worthy just because they can.
And if you look at Apple’s product set, I think there is a clear correlation between the frequency of redesigns and the competitiveness of that market and the duration of the upgrade cycle. So iPhone gets the most design attention, then iPad, then laptop Macs, then desktop Macs. Design effort following business priorities. It’s completely natural.
On the iMac Pro, I think it can be argued both ways. As you say, it could be the last hurrah for this chassis, or it could indicate that Apple is actually still pretty comfortable with this chassis design and is happy to launch a new high-end very expensive product using it. And I don’t recall many of the iMac Pro reviews talking about how this 5 1/2 year old chassis design is ugly or dated-looking - my recollection is that the reviews were extremely positive about the design.
And given that Apple now realises that its pro user-base are dissatisfied with its products, I find it unlikely that Apple would ship the iMac Pro and then slap them in the face yet again by launching a redesigned standard iMac shortly afterwards.
Given that Apple now makes the Space Grey peripherals available for anyone to buy, I suppose that might indicate that Apple may make Space Grey available for the standard iMac though.