Furious doesn't even begin to describe it.
They will have trashed the investments of every one of their users. How can they imagine that this will do anything but destroy the confidence of their existing user base without adding a single new new user, to say nothing of destroying their market capitalization?
They would be better off just wrapping up the computer business, selling off the iPod, and making a final distribution to sharholders.
One thing doesn't make sense to me ... if the earliest systems on Intel will be out in 2006, why kill your sales now by announcing it? Would YOU plunk down $3K for a new Mac to put into production knowing that if you just limp along for a few more months you can buy something faster and cheaper?