Mac Pros might be discontinued, but they definitely <i>won't</i> be replaced by daisy-chained Mac Minis that are barely user-customizable. Owners of a big-box PC want maximum power with good value and to be able to add or replace memory, disks, and other components quickly and easily.
That was fast. Ben Brooks' post on why daisy-chaining won't happen: <a href="http://brooksreview.net/2011/08/mac-pro-fast/" rel="nofollow">http://brooksreview.net/2011/08/mac-pro-fast/</a>