I can't wait to see the death of the "backlink".
I understand a lot of marketers enjoy it, but personally I think it's the wrong approach to search engine optimization.
There are daily algorithmic changes everyday (averaged at 17 hours in 2010 I believe) and personally I feel it would be a joy to watch the search engines move away from the "backlink" and more towards social presence.
I know they are already doing that, especially with Google +1 feature in Google search results, Facebook likes in Bing results, and tons of other things that they are taking more into consideration.
But when the "backlink" dies, I will be ready. If anything, I wish it would happen sooner.
These are just my personal thoughts on backlinks.
P.S. Backlinks are VERY easy to create, which sucks, and they are very easy to leave without footprints. But social networks are more closed, they relate more to actual humans and they aren't as easy to automate, and even if they are they are much easier to detect when they are fake. Seeing as Google+ now forces you to use a real name, that's another huge factor and I am stoked about it.
P.P.S. What do you think about the deterioration of backlinks and integration of social interactions relating to search engine rankings?