Conceptualizing that many Xboxes is kind of hard to do, so let's put that figure into a ridiculous, arbitrary context. An olympic-sized swimming pool, for instance, holds about 424,935 Xboxes, assuming a pool volume of 88,528 cubic feet and Non-S model 360s. In order to hold all the Xboxes sold in the world so far, it would require 165 olympic-sized swimming pools, with that 165th pool having a tiny little bit of space left over for some controllers and a copy of Condemned: Criminal Origins.
To put it another way, if every Xbox sold in the world were put on one side of a giant scale, 2,156 blue whales would need to be placed on the other side for it to balance properly, assuming a median weight of 250,000 pounds per whale. That's kind of a lot of Xboxes, you guys.