If it surpasses or just evenly matches the D800 in RAW IQ. Alot of 5d3 users will be quite angry at canon. (Me Included)
You bought the best Canon camera that satisfied your needs and budget that was available at that point in time.
Seriously, people who think like this about digital cameras need a reality check.
It's not that the 5d3 is a good camera. It's the best camera I've ever shot with.
It's that canon could have done better but chose not to. Instead recycled tech to make more profits and then releases another camera we really wanted with a sensor superior to the 5d3 for around the same monies.
Digital cameras rot, an unfortunate truth but a reality. If this new camera is equally priced to the 5D3 with equal IQ to the d800, expect 5D3 prices to plummet.