Note the sources the Appleinsider quotes: "people familiar with the matter".
Who the hell are those people? Could be anybody, and their intellectually disjointed sister.
Apple cannot do without a high end model.
The iMac is not a replacement with its heat issues and its bad screen. The Mac Mini is a joke.
If Apple dropped the MacPro, high end users would leave Apple in droves, and would never come back. And Apple would have to change its name to "iApple, a silly gadget company". Love can turn to hate, and this Apple doesn't need.
Also, the high end users are those who propagate the brand. The average Joe Blow consumer will buy an iPhone today and a Samsung tomorrow, an iPad now, and a Windows tablet tomorrow.
One day, the heat of the gadgets would dissipate, and what then?
The Mac Pro is a core product. It shows how good Apple products can be at the high end.
And there is no need. Apple still makes a profit with the Mac Pro. And it has so much money it would be idiotic to ax a good product.
In short, I think this rumor is 100% BS with high mental cholesterol values. It will die of a stroke, and hopefully soon.
iSteve, may he rest in peace, was the driving force of the main street-ization of Apple. I think there are more enthusiasts at Apple than at most other companies (discount the retail chief, who's departing for the Pizza Man or J C Penney or whatever), and they will have a say in this matter.
PS: Microsoft is so much hoping that this rumor is true. Their marketing department is already bossing out headlines "Need a powerful computer? Apples are for juicing, but Windows is for serious computing" But, again, I think they will get disappointed and will have to stick these headlines next to their greeting cards and cartoons in their cubicles.)