Also unveiled is the much-rumoured cheaper model of the new Xbox 360 S. The 149.99 (199.99 / $199.99) console will include 4GB of built-in flash memory instead of a hard drive, and will sport a matte finish rather than the glossy shell of its bigger brother.

Onboard wi-fi remains, and the console is officially known as the Xbox 360 4GB. It will be available at retail from August 20 in the UK and August 3 in the US.

A bundle containing Kinect, the Xbox 360 4GB and Kinect Adventures will be released in tandem with the seperate Kinect launch this winter. The package will sell for 249.99 ($299.99).