Source: http://www.engadget.com/2015/04/13/red-8k-weapon-camera/
Red launched the first mainstream 4K camera when 1080p seemed like overkill, and now that this whole 4K thing might work out, it's got an 8K RAW model. The Weapon 'Vista Vision' features a mind-boggling 8,192 x 4,320, 35-megapixel sensor that can do up to 75 fps, widescreen 8K. The chip is also 40.96 x 21.6mm or Vista Vision-sized, considerably larger than the full-frame sensor on a camera like the Nikon D810. Video can be recorded in RAW and scaled-down ProRes formats simultaneously, just as with the company's 6K Weapon models.
So, how much does it cost to be on par with Peter Jackson and James Cameron? A helluva lot. If we're reading the (rather confusing) pricing correctly, you'll need to order the company's 6K Weapon Woven CF "brain," or bare camera for a cool $49,500, then add another $10,000 for the 8K sensor upgrade. That makes $59,500 by our counting, plus whatever your accessories, storage and lenses cost. The upgrade price is only good until the end of NAB on April 16th, after which time it'll be $20,000. If you already own a Red Scarlet or Epic camera, you can get credits in various amounts towards the Weapon models.
Other specs are still unknown, as is the exact shipping date. Red actually launched its 6K Weapon camera just a few months ago, and it's still not shipping. We're not sure who exactly needs 8K, since there aren't a lot of TVs out there in that format -- but it might look great blown up to IMAX size. Red said the sensor would arrive by the end of the year.
Source: Red (forum)