The picture of the girl with the video screen is a walking billboard. The screen isn’t ironed onto the T Shirt. But I have seen a site one time that I can’t find again that advertised real TV T Shirts. They have a FLEXABLE washable screen according to the article. Go to http://www.projectorpeople.com and look for “OLED” (Organic Light Emitting Diode). It’s a thin film flexable plastic display panel. Probibly what they used for the shirts. As far as electronic circuits to drive the display and batteries are concerned, a flat lythium polimer battery could power it and I’m sure the electronics could be layed out on a flexible sheet also.

I build this that look likes this…
But it is very expensive and my one can only play music, video, photo works on a accu and runs on internal memory or memory cards.
The TV-Shirts does really excist but aren’t for sell for nomal people I guess.