I ran across these a few years ago at a lighting showroom. They DO look cool, but there are some practical disadvantages. Be aware that the nose cone light doesnt give off much actual illumination -- it's a notch above mood lighting.
Also, these fans take a fair amount of vertical space. I can't recall if they actually hang lower than the average fan, but they sure seem to visually. Not sure how easy it would be to walk under them....but could work great in a bigger room, with other light sources, and a bed to keep walkers out from underneath the fan.
And the price... well, it was around $275 when I was looking 2-3 years ago. That was the biggest reason I passed, in fact.