I believe the prices will come down sooner, especially with the sales of the D800 being so high! Canon cannot afford to let its reputation as a leader slip!
Also the landscape of photography has changed since 2008! Now far more amateurs are looking to go full frame, and far more movie makes are switching to DSLR! Actually the BBC and Hollywood using them too!
Uhh... canon is pumping out more 5d3's than the ever did with 5d2's during it's release and the camera is still backordered. On the BH Photo Video thread on this forum, some are awaiting a backorder well into june. It may be presumptive and some humor aside, but Canon isn't losing money to the D800, yet. Now once the camera demand settles, bodies actually sit on shelves longer than a day, and things iron itself out, we may have a better understanding of demand of the D800 vs 5D3 then.