For years the GWS (to my knowledge) is the biggest, unbiased (as far as that's possible) and most representative (that I've come across) overview of the state of wargaming worldwide.
As every year the idea is to get as many people to contribute as possible, because naturally, the more people participate, the more complete a picture we get. And that's the goal of the whole thing of course. You can see some of the results of prior GWSs here. Interesting stuff.
So, no matter what part of the wide and wonderful world of miniature and wargaming you stem from, please take two minutes, answer the questions, and tell your friends. In the end, you'll get a GBP 5.00 voucher at Karawansaray Publishing and the chance to win one of the several neat prizes provided by Warlord Games, Peter Pig, Karawansaray Publishing and others.