Slim G4 : Slim G4, 5mm under your hand

Maybe one day we'll have a built-in-hand mice ? What do you think ? At least the guys at Doa Korea want to give us an idea of how it could feel because with a 5mm thick and 94x53x5mm mouse you'll have to look under your hand more than once to make sure it's there ! Maybe the Pink (Silver or Blue) color might work as a reminder ?
Oh and yeah, it's an optical mouse !