A major step in the direction of combining context and content has been taken by Google. They introduced similarity search. So after you search for images using tradition Google image search, you could then ask for similar images. It will then return all images similar to the one that you select. It appears — have not played with it yet — that it searches for images among the set returned using the meta-data (a subset of context) search commonly used by Google but this time it uses content for similarity and uses context to keep it focused. In their demos it does look good — definitely looks better than Like.com.