Yes, this is real.

Check out the specs below, they look rather promising! 

The announcement of the new Nikon D4 comes several months after Canon also announced a new flagship professional DSLR, the 18MP Full-Frame EOS-1D X. Though the 12-frames-per-second shooting, 1080p-capable Canon 1D X was announced back in October, it won’t start shipping until March 2012 and will sell for quite a bit more than the Nikon D4: $6,800.

Nikon D4 Specs

• 16.2MP Full-Frame (FX-format) sensor, sized at 36 x 23.9mm

• 91,000-pixel sensor dedicated for 3D Color Matrix metering to assist with autofocus and scene recognition

• EXPEED 3 image processor

• Back-illuminated buttons

• 51-point AF System which is same as in previous model but with new cross-type sensors

• ISO range from 50 to 204,800

• 10 frames per second still shooting for up to 200 JPEGs; 11 fps shooting but focus and exposure are locked at the first frame

• Full 1080p HD video at 30p; 720p shooting at 60p for slow motion

• 0.012 second start time; shutter lag rate at 0.0042 second (same as previous model)

• Two memory card slots: one for CompactFlash cards, the other for new XQD memory cards

• 3.2-inch 921,000-dot LCD screen on back

• Price: $5999.95

• Shipping in late February

More details at the link below.

[Via source]