[SQL Azure] Federations bring great benefits of NoSQL model into SQL Azure where it is needed most. I have a special love for RDMSs after having worked on 2, Informix and SQL Server but I also have a great appreciation for NoSQL qualities after having worked on challenging web platforms. These web platforms need flexible app models with elasticity to handle unpredictable capacity requirements and needed the ability to deliver great computational capacity to handle peaks and at the same time deliver that with great economics. NoSQL does bring advantages in this space and I'd argue SQL Azure is inheriting some of these properties of NoSQL through federations.
via NoSQL databases