I get the feeling reading this that its just MP envy... I don't get it, half the comments are based on this idea that this is an upgrade for the mk2...it isn't, its a replacement for it, not an upgrade ---the upgrade is already on the shelves at stores...
And another thing I don't get - those who have a chip on their shoulder because the mk3 wasn't tailor made to their needs toss the mk3 under the bus and try to promote a fiction that its failing in the marketplace, when it isn't!!!. If you check amazons top selling slr list, the mk3 has been in the top 10 since it became available. For most of the time it has been right next to the d800 in sales...but as i look today the d800 isn't even on the list anymore (guessing nikon is having supply issues cause its no longer even in the top 20). Either way, the mk3 is ranked at 4th right now, and the top 3 are sub $800 camera's. That doesn't sound to me like a camera that's flopping....
I totally get that if your a studio shooter the mk3, or this entry level FF isn't for you, but, for those of us working in a variety of conditions, the mk3 is amazing...and if this entry level FF can hold its own in terms of high ISO IQ, then this may be an affordable backup body. Think of it, if ISO 12,800 on an mk3 looks like ISO 3200 on a mk2, then, if you can achieve similar quality (not even equal, lets say ISO 6400 looks like ISO 3200 on an mk2...then yeah that would be enough to make me say give me this entry level FF as my backup...)
I look at it like this ----I know many local wedding shooters in my area, and about half are canon, half are nikon ---- many are grabbing mk3's or planning on picking one up in the fall. On the nikon side, wedding shooters are going for the d3, d3s, or the d700. And the nikonians I have talked too have said they probably won't be buying a d800 due to the extremely huge file sizes (and if they did, it would sit in the bag most of the time, only to emerge for the formal shots or a few key ceremony shots - not worth it in most of my local communities eyes).
So, while the d800 is impressive, the mk3 is much more well rounded, and therefore fits into the marketplace quite nicely.
Now this new entry level...could be awesome, could be a flop, who knows...and same goes for the rumored d600...its all in the land of who knows...but hey, its fn to make a 30 page thread! LOL, the d800 vs the mk3 thing has been beaten to death, lets smack the corpse around a little more!