This is a good read, claiming: "Relational Databases Aren't
Dead. Heck, They're Not Even Sleeping", http://readwrite.com/2013/03/26/relational-databases-far-from-dead.
A key quote:
"While not comprehensive, the uses for NoSQL databases center around the acquisition of fast-growing data or data that does not easily fit within uniform structures."
There were 2 parts in the statement about NoSQL's uses. I'll start with the latter:
"data that does not easily fit within uniform …