By now this is old news. As all you Nikon shooters are aware by now, Nikon announced several new bodies a few days ago. The one with the broadest appeal and most likely to be of intrest to real estate photographers is the D800. Pretty impressive specs by anyone's standards and priced at under $3,000.
If there is any confusion in your mind about exactly which Canon body the D800 is intended to compete with all you have to do is notice that Nikon chose a production company Cap Gun Collective of Chicago to create Joy Ride, a promo video for the D800 release. If you recall this is the similar approach that accidentally happened to Canon when Vincent Laforet borrowed a 5DMk2 from Canon for a day and a half to shoot Reverie which turned out to be a huge promotion for the 5DMK2.
If you already have Nikon glass, the D800 looks like a knock out body for real estate shooting if you are considering including video in your products.