The free app transforms your tablet or phone into a second screen for the Xbox 360, and will be available on Windows 8 and Windows RT from October 26.
It'll be coming to Windows 8 PCs, Windows RT tablets, Windows Phone 8 handsets and iOS and Android devices eventually, but iOS and Android users may face a wait of several months.
As well as the stat attack, SmartGlass actually allows you to use your tablet or phone as part of certain games – titles like Forza Horizon and Ascend have already integrated the external devices.
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SmartGlass can also act as a remote for when you're watching films through your console, streaming other content from the internet or using the newly-launched Xbox Music service.