This is a very interesting discussion, wich I have been following with great interest.
 
I have a question that relates to this topic.
 
How does bit depth ( 8 bit vs 16 bit etc.) relate to all this.We are told that 8 bit color can give us about 16,7 million colors and 16 bit something much more (I don't wont even try to do the calculations).I know this is only in theory but lets say you have a 8 bit image in ProPhoto RGB and one thats 16 bit in the same colorspace, is there a difference between them as to how much part of the space they use?
What I'm trying to say is does a high bit image make a better use of a large colorspace than the 8 bit one?
Am I missing some point here or misunderstanding something?
 
Thanks again for very intersting discussion.
 
Best regards.
 
Jón A Sandholt