Not really if you pay attention to the set of NoSQL DB's available already. They are just hosting their own now.

Would be interested in details about any with Strong Consistency, decent replication across fault areas, which get the same level of performance (single digit ms) at a cost equivalent to dynamodb.

Quite a lot can be done with smart use of hugely scalable simple key-value maps.

Quality hosting/management is a game changer in my book.

"They are just hosting their own now."

^^ There's your game changer.

Which game?