The Wedge Prism optically shifts the incoming image to the riflescope by a precise elevation value, which directly adds to the available elevation travel within the riflescope.
Everything I seen about it was on instagram. Coles notes Taccom (who makes the Charlie tiraq?) Approached nightforce about a year ago about building their product under license. NF ripped off their product from the sounds of things.
This technology has been around for some time. Nightforces entry into the market just gives the internet white knights something to whine about. There are much cheaper options.