I am not saying Macs are bad machines. Far from it. Just the software I run is not available for Macs. My PCs run well and why fix what is not broke?
In the future, well who knows what will be available. The Cell looks promising for a multi-processor supercomputer. :-)
Are you aware of any work going on with Operating systems for the Cell?
You will be assimilated.
Unless you don't want to be.