Dyson, makers of what they claim are the world's best vacuum cleaners, have introduced a bladeless fan.
Looks very modern and impressive, doesn't it? Details of how it works are at the link. It's apparently selling like hot cakes, even though it costs far more than more conventional competitors (just as their vacuum cleaners do - which is why I don't own one!). For the $300 they want for the cheapest model listed on their Web site, I reckon I can buy at least a dozen conventional fans!
Nevertheless, the technology is very interesting, and Dyson have produced a video showing a balloon being pulled through a series of the new bladeless fans. It's quite fascinating.
After seeing that, I'd love to own one, if only for the novelty value - but not at that price . . .