things go in cycles I do not think anyone can really predict where SEO is headed in the future IMO. The reason I say that is because of all of the drastic changes. For instance if Bing gets a much larger market share, then google may stop doing spam algo's. Changing things like that may drive people to Bing and I would not underestimate Bill Gates and whatever the next internet craze is and the next "internet geniuses".
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