-A lot of smaller vertical search sites will pop up. MedicalInfoSearch.com will not show entertainment or economics info, and its ranking will not be based on backlinks from entertainment or economics sites. I think we are seeing the beginnings of this with Blekko.

-Or, and I say this at the risk of sounding like one of those social media people, the link graph will start to give more and more weight to Facebook Likes and link sharing and twitter sharing and any future social network sharing. If you think about it, this was the reason Google went with the backlink strategy to begin with. Back then they had no social networks, so they only way someone could vote for a site was by putting a link to it on their website. If you did not have a website you did not get a vote. Now almost everyone has the capacity to vote on a websites quality, but for some reason only website owners are allowed to. Social networks love info graphics, in this future you are going to see a lot of them.