I'd love to see this tested at the Fan Showdown [1], it's a youtuber who 3d-prints user-submitted fan designs. Or given that the article is from 2020, maybe it was tested already.
I don't think this design would help with a CPU cooling fan. There's a reason they went from planes to water, and I think that same reason would apply even more so for a CPU fan.
If you're going to spend the space, simply use a bigger fan at lower RPMs.
Electric fans for homes are a more interesting question. I was going to suggest that a Vorando or Dyson already has a lot of elements of this, and gives more bang for the buck, but I think the two could be combined. A Vornado-style fan really reduces vortex shedding, but probably has some turbulence internally. A modified prop design could reduce that a lot.
This tech requires a significantly wider propeller assembly - quite the opposite direction that consumer tech is going in for all but the most powerful machines. I suppose that gamers might accept a significantly larger case for quieter cooling, but for general purpose computing I think that larger, fanless heatsinks and smaller, more efficient CPUs are the answer.
I think the noise is also an important issue for CPU cooling fans or electric fans for homes.
Would love to see such propeller made into everyday small fans.