A rather dubious example, considering the image without the banding is displaying just fine on a 24 bit display! As I understand it, the banding comes from processing the image. Consdering there's banding present in the compressed signals these displays are being fed though, I'm really skeptical 'deep colour' can have any benefit. Converting a 24 bit image to floating values, prociessing that, and then converting back to 24 bit colour space, should elliminate the artefacts of post processes.
