Too much words burring Apple's Pro products. I try to give a futuristic answer. It's only a concept, idea if you want. Nowadays Apple's technologies can't meet this concept requirements, but who knows... Mac Pro Pros Mac OS X High Performance Expansion PCI-E slots Upgradebility Cons High starting price Big footprint The problem We don't grow explosively, we grow consequently and our demands grow step by step. We start with Mac Mini or iMac. When we need to upgrade we need to buy a new computer, and we want to return our investments to Mac Mini or iMac. But how? We want to protect our investments and thus we choose PC, which have less starting price and have almost unlimited ability to upgrade part by part. Future Pro desktop system Features Mac OS X Step by step upgradebility from "Mac Mini" spec. to "Mac Pro" spec. Small or medium footprint Expansion PCI-E slots Architecture Stacking bricks design System consists of several "bricks" - compact computing blocks similar to Mac Mini, which can physically stack like lego bricks and form tower-like system. Easy locking connector between bricks Unified brick design Brick form factor and connector physical design meet next 10 years connectivity requirements AC power connection Power/reset/lights connection USB-like connection Thunderbolt-like data connection Ethernet-like connection Buses should be able to enhance their performance with backward compatibility Hot swap is a plus Base brick is a starter for a system with specs and price of Mac Mini Each brick has its own power supply for better heat dissipation Desktop cloud operating system Each brick runs hypervisor All bricks together form a desktop cloud Operating system runs in desktop cloud Software can utilize all system resources like on a single computer Balanced set of specialized or general purpose bricks Base brick (CPU, RAM, HDD/SSD, Optical Drive and communications) General purpose brick (CPU, RAM) GPU biased brick Storage brick (Disks, external SAS/FC/Thunderbolt) PCI-E brick Why Apple? Only Apple users has a demand of highly upgradeable desktop system from home Internet station to power workstation, PC users already have an option to consequently change any of parts in their ATX cases. Only Apple with its innovative way and charisma can create a new form-factor of desktop computing systems. Sounds too fantastic? Yes, it sounds very fantastic today, but isn't Apple is a company that creates fantastic products?