I think it would be cool to see the hardware of an xbox One inside of the shell of an original Xbox, I would like to see it on the Ben Heck show to get an idea of how to make my own.Also it would make a unique Retro Xbox.

Take a FAULTY original Xbox, open it up and remove the power supply, hard drive, disk drive and motherboard. Do the same for the xbone. Then put the xbone mobo into the original Xbox case. Mount the disk drive somewhere and wire the power and eject button to the points on the board. Put in the other parts and close it up. Make sure nothing shorts and remember: hot glue is always useful.
Take a FAULTY original Xbox, open it up and remove the power supply, hard drive, disk drive and motherboard. Do the same for the xbone. Then put the xbone mobo into the original Xbox case. Mount the disk drive somewhere and wire the power and eject button to the points on the board. Put in the other parts and close it up. Make sure nothing shorts and remember: hot glue is always useful.