But that was the most restricted launch supply of any major console platform.
They did a great job of creating the hype. The 360 has largely been out-of-stock at retail since its launch last November. So clearly, selling out is one sign of performance, but you can't say that its market potential has been even close to tested with the limited supplies available.
It really depends on when the next two systems launch, and with what launch titles to drive demand for the hardware.