It seems to inherit most of the features of the Nikon D90, EXCEPT the weight, pentaprism (D5K has a pentamirror it seems), the second command dial, ability to add a secondary battery pack, and the in-body focus drive for lenses that lack focus motors.
There seem to be some improvements too though:
– Swivel LCD
We will see how it matches with other models and the Canon’s recently announced T1i. I will add a preview of this camera here soon, do keep watching this blog!