So much of the discussion here has to do with processor improvements, 6-, 8-, 10- and more cores, all of that greater power, and other similar aspects of any new model introduction - I wonder what percentage of users are really making use of such capabilities and how many really need it.
I certainly do not, at least I don't believe so - and I'm guessing that my needs are similar to many others. I make use of the Office applications, do limited numbers of spreadsheets that don't come near to utilizing the full capabilities of Excel, do lots of e-mail, web browsing (of course), streaming video (Apple TV app on my iMac, others), those kinds of things.
I don't do a lot (really any) of photo taking and editing - but do even those applications really require much processor power? Same with respect to video editing, I can imagine that would be more demanding, for those who do those things. But do most people do much more than what I might call basic editing of photos and videos?
The community here is very knowledgeable and sophisticated in understanding very fine nuances to specs and capabilities. That is great and I learn a lot from following discussions here.
But to get back to the discussion of a computer such as the iMac (not the iMac Pro), this is a computer intended for a broad user base, isn't it? MacBooks too (most of them).
I would be interested to know what % of Mac users really do things with their computers that push the capabilities. I am sure that Apple understands this very well.
They surely have their fingers on the needs of their users, as well as a wider consumer base of customers that they want to attract to the Mac - this is where gamers probably enter the picture, since one area the Mac is inferior to a Windows computer seems to be gaming (not saying that is the only one).
What matters to me? Large and high quality display. Enough RAM and storage for my uses. Processor that can run the programs I use. Reliability - thus SSD only. Compatibility with the programs I use and the files I've accumulated over many years.
So - as Apple develops their plans for introducing new models, enhancing their product line, introducing new chips, etc., while I'm sure they want to be as state-of-the-art as they can, I also think that from a practical standpoint the meaningfulness of most of these improvements is not really applicable to a large number of users.