Originally Posted by pilotbob
There are not "extra layers" on the Kindle touch devices. The touch is done with infr-read light that is cast as a grid over the screen. You can't see it and it isn't a physical layer on the screen itself.
This is true for the Kindle Touch, but the Paperwhite screen isn't IR it's capacitive (which IIRC is a chemical layer that's 'painted' onto the screen).
As for the devices feeling too light. A nice cover like one from Oberon can take care of that and add some weight.