Well I think it's new but may have seen something similar before.
The Stealth anchor looks like it has a large surface area for it's weight and folds flat for storage. sizes seem to be about 2.5 or 3.5kgs so ideal for a SIB. The bigger ones would be great for a RIB as well.
In most places it is the surface area NOT the weight on an anchor that counts - the weight is useful when it comes to getting the anchor to set.
A buried parachute is a good example. Weighs next to nothing but would hold anything if it was buried in the mud!!!