Is it a unique "art piece" and "technical novelty"? No question. It is cool and who wouldn't want such a thing on their desk?
Is there something about using a sphere to diffuse and distribute sound waves in an omnidirectional pattern? Yes, but only at high frequencies for something that small.
Does the diffusion sphere have to be levitated with no physical support to be effective? Certainly not. This principle has been used for many decades via conventional technology.
Is the significant extra power required by levitation justified? Not on the basis of any acoustic performance. It is only for show.
Are the claims made in the video logical? Not IMHO. They are full of marketing wank, doublespeak, and steam is still rising from the piles of animal waste.