Depending on the actual fabrication process, the likely lack of being able to tension the spokes is an interesting attribute. My instinct would be that they may be too flexy, but like other wheels with no tension, the details of the fabric layup and surrounding material can be tuned to give a range of feel.
Would have been interesting to see if they did a bunch of FEA models and then launched into protos to see how close the estimates were for things like deflection, stiffness, etc.
That and other similar wheels are an engineers dream project 