If you hadn't noticed, GW is starting to slip in more ways than one. They don't run "official" tournaments anymore, instead relying on retailers and venues to run them.
And Adepticon had a bit of a falling out after last year and opened up to other games and companies this year.
Privateer Press games had a huge turnout this year. Which means that's it's high time for Wyrd to jump in on this and take away some of GW's old glory.
Slowly but surely, GW's iron grip on miniature gaming in the US is slipping and companies like Wyrd and Privateer Press are the reason. Oh, and the economy.