Those clever guys at Vesta Sailrocket are out to beat the Outright World Sailing Record and sail their new boat at 60kts. That's 20% faster than the record they set in 2008 and 8.5 kts faster than Hydroptere.
The Outright world speed sailing record is set by taking the average speed of a craft between two points set 500 meters apart. It's currently held by a kite surfer.
You can read more about how they have improved the boat design here. It's all Greek to me. Physics was never my strong suit. I think the basic premise is same boat design but less likely to fall apart but I am grossly over-simplifying. Elaine Bunting does a great job of explaining it so even I can almost understand it. There are also some great up close shots of the new boat.
Below is a video of their original trials set bizarrely to the theme tune of "The Sopranos".