The Spring Data project looks cool and is definitely appealing to us, (Java) developers.
However, since Couchbase has just added Full Text Search capabilities, it would be nice to have a Search/Index API as well.
Spring already has such a project for ElasticSearch/MongoDB, so providing such API will help us to simply annotate the search-related fields and have a functionally-compatible solution.
As opposed to other solutions, Couchbase allows us to store both objects AND search indices in one place and that’s a major advantage (collocation is usually the reason why indexing is relatively slow).
Search API, Spring-style, will bring it to the next level (Search-related Annotations like @Document, etc).