They'll make buckets of cash from the upgrades as usual and external TB stuff.
They won't sell a lot, but probably 20x as many as a refreshed version of the current Mac Pro would sell.
At first I thought you were exaggerating, then I went through the old threads here. What an eye opener.
And you're right, all anyone ever does is complain about how big and silver the old Mac Pro was and how much they wish it had fewer drives in it. They didn't want an update, they wanted a whole new WAY to compute !
Here is a partial list:
"I can't STAND having all of these Hard Drives to pick from on my desktop. I wish I only had one internal and maybe just one external connected by a cable or two"
"my PCIE cards run so fast I can't see things moving on screen. I wish there was a way to slow them down to 1/4 speed"
"my MP looks like a cheese grater, I came back from an appointment today and the kitchen staff had grated 2 lbs of Cheddar into my front fans"
"Square & silver versus sexy, black & tubular, why don't they make the next Mac Pro look more like my trash can so they match better?"
"If only my MP weighed less, it wouldn't be so hard to haul from my parent's basement to my buddies house for LAN parties. FML ! "
"Why do they make Blu-Ray look like that? All the sharp outlines, clear edges and a gazillion shades of grey & black is just confusing. They should make it look like iTunes HD or Netflix"
"I want a mac Pro that I can dress up as R2D2 for Halloween. Sometimes I get lonely by myself"
"I am morally offended by the Optical Drive in my Mac Pro. I pried it out with a crowbar, but it's vacant hole mocks me"
"I am bewildered by the giant maw of storage options on my Mac Pro. Why doesn't someone sharply limit me to fewer and more expensive choices?"
"I want USB 3 and Thunderbolt. But ONLY IF they are not in a silver computer. Silver is the new Beige, I WANT BLACK !!!!!"