Of course not, but finally thankfully people are starting to take serious stock of other types of Databases. I'm no Database expert but for ages I never understand why I was serialising XML into a relational database to pull it out a bit later in XML. So I started doing some digging and found out about XML databases and object stores. This was way back in 2001. Later in 2004, the suggestion of a XML database or any other database except MySQL, PostgreSQL or Oracle was a no go. How things have changed.
In BarCampLondon7 Simon Wilison gave a talk where he listed a range of different types of databases or datastores. There all listed on this Etherpad titled #bcl7 non-relational database BoF. A very impressive list indeed and there's much more. So will we finally see people moving away from the LAMP stacks? Maybe but I its going to take a while.