I ran across some introductory slides on Neo4j with the line:
Forrester estimates that over 25% of enterprises will be using graph databases by 2017.
Well, Forrester also predicted that tablet sales would over take laptops sales in 2015: Forrester: Tablet Sales Will Eclipse Laptop Sales by 2015.
You might want to check that prediction against: Laptop sales ‘stronger than ever’ versus tablets – PCR Retail Advisory Board.
The adage “It is difficult to make predictions, especially about the future.,” remains appropriate.
Neo4j doesn’t need lemming-like behavior among consumers of technology to make a case for itself.
Compare Neo4j and its query language, Cypher, to your use cases and I think you will agree.