Industries where SEO/PPC is not key?

I have been wondering if there are any industries where the highest ROI way to attract customers was not SEO/PPC.

Popular belief is that you should go for SEO/PPC and forget the rest, it seems...however in some industries certain things clearly work better than in others.

Does anyone know of an industry where the main way to attract customers (online) is not SEO/PPC? There are so many possible reasons (SE traffic having low conversion rates, b/c of trust being important for sales,etc.)

Or perhaps a field such as this webmaster stuff , where the industry is simply highly-connected (What other industries is the computer-savy demographic part of?) with forums, blogs,etc. - and online WOM being important?
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SEO UK|Search Engine Marketing