Advantage：Cool appearance

Disadvantage: The keycap stability is not enough, keycaps can be easily bumped. 

    The floating keyboard was brought up by Acer Timeline series. The keyboard is floated structured with chocolate keycaps. Actually, keycaps of floating keyboard are flat, while keycaps of isolating keyboards are cubical. That's the reason why there is no need for groove on the floating bottom to match with the keycaps. 
   Floating keyboard is very cool. The surface is flat and the supporting point is under the keycap, giving the feeling that the keycaps are floating above the tablet.This special scientific structure makes the special touch feeling. The keycaps will be highly sensitive with light click force. 

There are also disadvantages with the floating keyboard. The gap between the keycaps and bottom space makes it easily fill with dust and other dirties, which is hard to clean. Once big things get in the keyboard, the keycaps will be stuck.