I hope this was sarcasm...because your gaming rig wouldn't have a chance to keep up with this without spending as much as the price of this in upgrades.
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Name one as portable and that takes up such little space as well as remains as quiet, is as cost effective, and uses as little power.
Not really... Some Core i7 processor crashes the lower tire of Mac Pro. Also you can pretty much build a server grade PC with much lower cost.
I do not care if it take small space, it gonna sit there and never move again. I never get the idea of make desktop PC smaller with no or limited upgradability and expandability.