The recently announced Xbox One is now available for pre-order for $499. The “Day One” edition will be available for a limited amount of time for pre-orders only and includes a limited edition controller and some other bonuses. There is only one Xbox One SKU and it comes with the new Kinect sensor.
You can pre-order now at Amazon. If you want one on launch day, do so quickly. There is bound to be shortages at launch.