A t-shirt which allows the wearer to share their Facebook status, Tweets, photos and songs with anyone who walks past has been demoed on the streets of London.

'T-Shirt OS' is literally a wearable garment with its own operating system.

It comes with a camera to take photos, a headphone jack to listen to iTunes tracks, and several other functions controlled via a mobile app.

It has 1024 LED lights on a 32x32 grid, and can display a full range of colours. The camera is an Omnivision Camera Cube, with a footprint of mere millimetres, and it also has a three-axis accelerometer, which can detect when the wearer jumps or moves at speed. It also includes Bluetooth, and its own circuit board and processors.

The t-shirt was previously shown online to wild acclaim, and in a new video is seen working for the first time around the streets of London.

Yes, there are still questions - primarily, how does it work, and when can we get hold of one... But it's still a cool concept, and if the future has more gadgets like this in it that can only be a good thing.

Take a look at the T-ShirtOS in action, above.