Honestly what needs to happen next is a serious effort to explain why or when rethink is better than mongo, cassandra, arango, aerospike, memsql, mysql, riak, or postgres, ++, not to mention all the TSDBs. On the event pushes I am unconvinced that message queues/computation graphs arent superior and that's another crowded space. When I last looked at it the advantages struck me as mostly incremental on the query language and decremental on performance. There are many excellent competitors in this space, most of which are well funded, and moving targets. Rethink doesn't seem to have a USP, or none that has been effectively communicated at least, IMO.