There is a new trend towards raceboards with extra thickness/volume from the nose to the front footstraps, and then a sudden change in thickness. Camet board shown here:
I've heard two reasons for this new design, more aerodynamic and allows for a thinner board by having extra volume in the nose to get you waterstarted in marginal conditions.
The aerodynamics thing doesn't really make sense to me. I guess every little bit helps when you're at the top, but out of the projected area of the rider, kite, lines, and board, this affects only a very small percentage of the area. Also, it's typically much more important to add fairings on the trailing edge than on the leading edge to reduce drag. So even if reducing aero drag of the footstraps is significant this doesn't seem like the way to achieve it to me.
I can see where having a slightly narrower board does give an advantage though. Being able to lean over a few more degrees upwind without clipping waves could really make a difference, and I can see where extra volume in the nose would help with marginal wind waterstarts on a super narrow board.
Enata has this type of board on their website too. Then saw today in this video at 2:30 looks like a soft cover over the top of the footstraps: