Early to tell. They wouldn't likely say too much at the WWDC this week. Clearly, the all in one (AIO) desktops are not a 'prime' category. Laptops, tablets, and minis with multiple screens are the way things seem today. I guess content creators are often the desktop people mentioned but even they use different set-ups rather than an AIO. With the color options Apple seems to be trying to make it a centerpiece for the home ... but the younger you are the more likely you would choose a laptop and plug it into a screen ... if you needed the extra 'real estate' (and be hanging out in your bedroom, or dorm). AIOs just seem to be passe. Just my opinion, of course. *Maybe the virus has made them a little more relevant?
Firstly, we'll very soon see what gets unveiled or possibly strongly hinted at WWDC.
Second, I don't think Apple would be all that interested in the iMac if they didn't see it (as their AIO system) as a 'prime' category. It's been Apple's most productive product since the compact Macs, and I don't think there is any actual evidence to suggest who the common users and groups of it are, or have ever been - including age groups.
It's a bit easy to simply conclude that the colour implementation of the M1 iMacs is about targeting home users, but I doubt they have their sights as narrowly focussed as that at all. If I had to make a guess, I'd say that their decision to use colour this way is not about 'the home' but about marking out the M1 iMac as 'different', and 'fun', and putting 'cute back in computing'. It's a style statement, which isn't (I think) about location of use so much as people, wherever they are.
Given that it has never been unusual to find Mac users who have both a desktop and a laptop, I also doubt that Apple are expecting all that different a market for either going forward. They have also been highly successful in recent years with multiple products in both these market segments, so it doesn't seem likely to me that they are likely to want to change that broad product lineup particularly.
Where I think the M1 scores is the ability to blur the lines between their traditional 'consumer' and 'pro' markets. If, for example, a base-level M1 iMac can compete against an iMac Pro (as we have seen in at least one review that it can), then differentiating these markets becomes less important, but would rely on some other factors than merely sheer horsepower. It would, for example, be more than feasible to envisage a Mac Pro which is actually more of a modular M1 (or M-whatever) mini than the discreet big-box system it has previously been.
Apple Silicon gives Apple a lot more wiggle room than Intel could have, and it would be a surprise to me if Apple was not thinking pretty clearly about how to use that fact with their product ranges and target audience into the future.
*If the pandemic has made any product range more relevant, I'd say it is not so much All-In-Ones as laptops. In my organization, for example, we resourced working from home for our professionals and staff with a whole lot of new laptops. As far as I know, I was the only one using an AIO.
(None of this is actually to argue, so much as use your post as the base from which I could justify giving my view of Apple's positioning and plans)!