So I'm pretty sure stuff currently doesn't work like this, but I've always dreamed of a system where I could basically get two Mac Pros, link them together that now I have one system with double the power. I know I can use qmaster and do network rendering and stuff, but it's not the same. Would be great if you could mix and match systems at will and they would scale up automatically, like plug and play power upgrades. You have one Mac Pro now, when you need a beefier system you just buy anotherone and plug them together using something like a Thunderbolt cable, the main MacPro would just see the other MacPro in "Target Processor Mode" and be all set. Even a room full of Mini's working together would be pretty sweet! Alternatively then Apple could make vegetative Mac Pros that are only used for this purpose. Kinda like the server nodes they had. I know this can be done in some clustering way using Infiniband or something, but I think you need special software that will work with a setup like that. I would love a plug and play system. Basically not just a render farm or cluster, but a way to make your own super computer. Also, I spent some time at ILM and learned that all the desktop systems in the building are used for extra rendering power when not in use. Kinda neat. So when the receptionist, or even the CEO goes home for the day, their computers get tapped into for rendering. Their server room is one of the coolest places I've been. No joke, there are like automated droids that vacuum and sweep the floors, like Star Wars edition Roombas LOL.