Microsoft will release a digital TV tuner for Xbox One this October in the UK, allowing direct access to digital TV using the console's OneGuide. The tuner will retail for £24.99.
The device will plug into any of the Xbox One's USB sockets one end, with the other accepting your TV's aerial lead. You'll be able to utilise all your normal Xbox One functionality - Kinect voice commands, use Snap mode and receive game notifications.
For more info, check the official site.