There is a good piece in The Times about how important it can be to a resort to have a quality snowpark, without which they miss out on a crucial demographic group. The article goes on to list some of the best parks and pipes, not surprisingly most are in North America.
I remember being wowed at Blackcomb on finding an entire run with perfect tabletop after perfect tabletop all the way down and how impressed I was (and intimidated) by the perfect super pipe at Whistler. Although I am more of a free rider than a park junkie it does annoy me the way so many European resorts pay lip service to the idea of a park/pipe by building but not maintaining them.