We never see a full profile of the bow, both above and below the waterline. 
The profile as shown looks like some world war two submarines.
Some Military ships around World War One had bows that sloped aft from the waterline .

The reverse bow extends the waterline for more stability and better tracking. That's why it is most common in catamarans which have small wetted surfaces by design and little keel structure. That's also why many designers started to use the reverse transom design rather than the traditional overhanging transom. But a reverse bow goes against general rules of yacht design. The traditional overhanging bow deflects the water ahead and lifts the bow over the waves. It also extends the 'effort' of the foresail ahead of the waterline so the boat comes about quicker. The reverse bow looks to be designed to power through the waves. I think it would be a chore to bring a reverse bow around on a tack. Looks like designers are trying to be radical rather than practical. The traditional bow form has been around since ancient dhows sailed the Persian Gulf and beyond.