Slim speakers in the world

FleXspeaker which was developed by a company of Taiwan, ITRI has shown that the product is very thin speaker. So that we may not be aware of the existence of this speakers if mounted on a wall or other places. FleXspeaker not only thin but also flexible so that it can take the form of curved surfaces will be fitted this slim speaker. Flexspeaker also consumes very little power, are perfect for other portable applications?? = P 
Unfortunately, FleXspeaker can only issue up to 20 kHz output at the moment.