The Nikon D90 was one of Nikon's most popular DSLR cameras, both among enthusiasts and professionals. And for good reasons too. It was the world's first DSLR to have a movie mode, shooting 720p high-definition video at 24 frames per second in the Motion JPEG format. So popular was the D90 that two years after its launch, it continued to sell well for the company. Still, it was getting a tad long in the tooth; and with newer and better features introduced in DSLRs from competing brands, it was also begging for a refresh. Nikon finally answered the wishes of many and introduced the D7000.
According to Nikon though, the D7000 isn't exactly an upgrade to the D90. Instead, it sits between the D90 and Nikon's APS-C flagship, the D300s. In some ways, the D7000 does share more with the D300s than the D90, and even outclasses the one-year old D300s in some aspects.
For example, both the D7000 and the D300s share a solid magnesium alloy body, while the D90's was made out of polycarbonate. The sensor is new too, with the D7000 increasing the megapixel count to 16.2MP over the D90 and the D300s' 12.3MP. Recommended ISO sensitivity range is also upped from 3,200 to 6,400, and can be further expanded to 25,600. The D7000 doesn't match the D300s' 51 focus points, or its high 8 fps continuous shooting rate (though we don't consider D7000's 6 fps to be slow either) - but it's better than D90's 11 AF points as it adopts a 39-point AF system, of which nine of the points use cross-type sensors. Last but not the least, the D7000 is capable of full HD 1080p video recording at 24 fps.