Sales of knitted lap blankets are off, too...
I remember hearing from my grandparents about the de-Germanization of certain common words during WWI, such as 'Liberty cabbage' for sauerkraut... and the British royal family suddenly changed their name to Windsor from Saxe-Coburg right about then, too.
Since they've already been metamorphosed to "throws" by the mass-produced machine knit versions that can be purchased with about every imaginable design, maybe afghans won't suffer so badly - but I'll be surprised if they're called that for much longer, other than by people of 'a certain age'.
E'