There's nothing at all fancy about an air mover like this. You can make one on a lathe in about 20 minutes with a few bits of roundstock scrap. You do still need an air source to use it. In this dyson thing, there's just a hidden blower in the base. In a computer, it would allow you to use a much larger, separate source to cool your cpu, which could be useful. It would rock even more to use a vortex cooler...
Edit: Doh! Cited above while I was typing! Great minds and all that yap...