Exactly! It is the World Science Fiction Convention for the World Science Fiction Society, and the former official name of the award which was dropped as too generic was the "Science Fiction Achievement Award."

But the suggestion to change the rules was a bit tongue in cheek. The real question is why this sudden shift, from 100% SF to 80% Fantasy? Is it a change in demographic, a change in tastes of the same demographic or a real change in the quality of work being done in each genre.

There have been some other changes, possibly correlated, possibly not. There's been a move away from U.S. writers who used to dominate. This year there were no US best novel nominees (in part due to the convention being in Scotland, perhaps) and in recent years there have been good supplies of Canadian and British writers on the nominee list, and only 2 American winners in the last 5 years. Consider that in the all the over 50 years prior, it was all U.S. winners, except for 2 by Arthur C. Clarke, one by John Burnner, and one by William Gibson, a U.S. expatriate living in Vancouver. Not that this is a bad trend (I'm not an American myself after all!) but it is quite a shift as well.