It's unfortunate that the HD video capabilities are as of yet unavailable in a full frame camera as the depth of field on a crop body doesn't give the same DOF as FF. As for the comparisons with the D300S, the D300S has a MUCH better AF, whereas the newer D7000 outdoes it on the metering front. For high framerate photography a gripped D300S will outdo the D7000.
What you ARE getting over the D300S is more megapixels (whether this is considered an "advantage" is debateable), higher ISO performance (marginally, but sample photos are promising after some NR) and HD video capability that truly outdoes any Nikon offering up to this point--whether that is compelling enough to draw converts from the Dxxx body line remains to be seen. Additionally, the lack of CF support, is also a thorn in the side of anyone with a large CF card collection--something Nikon could have avoided with a CF/SD dual slot.
The AF may be a deal-breaker for some users, such as myself, but I will need more time with the body before I can make a judgment whether to downgrade to the D7000 instead of waiting for a D300S replacement, which this camera isn't. The technology in it, though, should definately be included in the D300S and D700 replacements, though.