Seeing has how there is a dual monitor setup this can mean:
1. This is a development setup. Left view is for the target xbox while the right is for the development pc. Keyboard is for 360 input.
2. The user has two xboxes, so both monitors could be hooked up to both machines.

Also, the power sockets are conveniently setup with the desk space (IMO). This could be by luck or by actual design...as in a studio or home testing area.

My best assessment is that a friend of an employee or tester (as all of Bungie recently took the game home) used their shotty cell phone to raise the size of their epeen.