Quoting a blog post of the 451 group we can do some remarks on NoSQL. First of all many person do not really know what is NoSQL and the worst of it is that many persons claim to be IT consultant does not really know anything about NoSQL; they simply think that NoSQL is a different kind of database that don't use SQL language!
Second NoSQL is a widespread concept that has been used for different products without really leveraging the single functionalities; this has been caused market confusion and it haven't helped the real diffusion of concept and use.
Probably only few persons known the theory behind NoSQL, the differences between BASE and ACID, te CAP theorem, the differences between NoSQL datastores, etc.
Also today you hear from many sources the term BigData. Do you know that BigData is a trademark of a company called SysTap ?
Furthermore the big problem of NoSQL in the enterprise: is the eventually consistent model applicable to your business?