I think the reason why we're stuck with the current Mac Pro is because Apple learned the wrong lesson from the Power Mac G4 cube. It was beautiful but few people bought it because you could get the more powerful and expandable Power Mac G4 for less money.
This time around, Apple didn't build the the tower nearly everyone in this market would have bought instead of the trash can.
This time around, Apple didn't build the the tower nearly everyone in this market would have bought instead of the trash can.