
Back in March 2000, Bill Gates took the stage at that year's Game Developers Conference and unveiled the first-ever Xbox prototype. It was not shaped like a box, but instead the letter X, designed to demonstrate the third millennium power of Direct X, a modified version of which powers the original Xbox.
Anyway, it was glorious, and still is, but it cost Microsoft $18,000 (roughly $36,000 today) to cut from a solid block of aluminum, and so naturally they opted for a much more affordable and box-shaped ABS plastic case for the retail version of the console.