Some of the different company’s that offer it seem too be some called
Neo4j
orientdb
From the video and research i have done it seems too offer a more powerful search if you use it for Users, POS systems for internal uses, and more, i dont think it would be good for using in scada systems where you are bring back data from sensors, This is where i think a Rational System would be better, but i could see a more dynamic system taking the stage to for a lot of items.