That sounds weird. Why would they add the colour that was until now the only differentiating option? And why redesign only one machine? It will either be both or none (unless its two extremes)
I don't see Apple spending resources and redesigning something that doesn't sell in huge numbers. If they redesign they will do it for both models. Before there was no Mac Pro but now the situation is different so wasting resources on iMac Pro is silly.
So both or none
Its Tim Cook we talk about here
They'll redesign both at the same time. They're essentially the same thing with different motherboards.
The iMac needs a damn good shake by the scruff of it's neck in design and specs. It's out of date. Expensive. And looks it.
Otherwise the iMac is going to look like a prehistoric relic compared to the iMac Pro and Mini. Not to mention archaic, outclassed and embarrassing compared to the M$ Studio 2.
Apple did redesign the Mac Pro after 6 years (shocking) only to give it a gargantuan price tag, a naff entry model and it won't sell in huge numbers (wonder why...) but...it's great design but shows they will re-design for a smaller audience.
iMac Pro. iMac. Consolidated chassis. Only m/b and config' need differ. Xeon vs i9/i10/iWhatever. ECC ram vs mainstream ram. That will be the main difference with a slight bump in specs vs the base configs of both.
I can see the rational for keeping the iMac Pro on as a middle man price option or step towards the insane Mac Pro. But really, the iMac Pro was an obvious stop gap. It could well go the way of the fairies.
What I'd really like to see would be an iMac Pro Threadripper and an iMac Ryzen. Now we're talking. But the 'grey' pro' paint would still be the same.
Tim Cook? Not a product guy. And the 6 years on the Mac Pro proves it if proof wasn't obvious in other areas.
To me, quite easy. Sell the iMac 5k display as a stand alone. Double the size of the Mac Mini. Make it a mid-tower or a version of the Mac Pro with a mainstream m/board and you can replace the gpu when it fries... It would give users more options. I won't hold my breath though.
At the least though, the iMac might receive an anemic spec bump like the iPad z and mac 'mini' (and both have been mini updates.)
Azrael.