I have a colleague who develops for apple and he mentioned a rumor floating around the office that Apple would create a desktop between imac and pro. In addition, they would eliminate consumer purchases of pro series desktops since most sales are for business level applications. However, the so called new setup would start the mac pros around 8k eliminating the lower end of them.
Based on that, I think what they're trying to do is just rebrand like this.
Laptops
imacs
New Consumer series - a slightly in between imac/pro series bordering into the low range mac pro, but reclassifying it as a high end consumer product.
Pro - Mid to highend mac pros where the sky is the limit with customizations