It is a a LCD that is Transparent.And not only this,it also gets power it needs from the ambient atmosphere.
But the ambient power is not enough to replace LED back light.
If you think thats it then think again.Because,this LCD delivers Full HD display which is 1920x 1080 pixels.And it is also multi touch enabled.Actually it can detect upto 10 different finger press.
Samsung showcased it at 2011 CeBIT,and confirmed that it is still in prototype stage.The actual version of these type of LCD is yet to come in near future.
Minority report here we come......