Bonjour Bernard,
The D800 actually seems to be priced at a sweet point. But yes, the hype abut likening it to a medium format is a bit annoying.
Michael did quote recently on LuLa a comprehensive study about compared resolution from large format view camera all the way down (!!) to a D3X - that was quite an eye opener for me - you do indeed get what you pay for (in time or money).
I wish they had extended the range of the study all the way down to high end compact cameras though - with another protocol obviously.
Best,
Stephane