Do you have any idea what that would weigh on a plane?
Well, a centrifugal fan, like any other motive device, would have a weight to power ratio. Its blades would be considerably smaller and lighter than a prop or rotor, because the the distribution of force across them.
Plus, they could use easily machined titanium alloy instead of much heavier and more expensive materials. And the length of fan blades per section would only be limited by the structural strength of the blades over the given circumference of their barrel, and the strength of the barrel.
Its biggest gain would be by having a much simpler engine and likely computer control and stabilization. Other than that, just a joystick control.
I’m less a fan of the fanwing design prototype, because it is too reliant on prop aircraft design, where it doesn’t really need such a design.