A nice article from @Lenzker on how to migrate from a Standard vSwitch to a vDS in preparation for deploying NSX.
Get ready for NSX phase 0: Migrate from a vSphere Standard to a distributed switch
The distributed switch (vDS) is a really nice piece of software within the vSphere environment. It offers a variety of very useful features (NIOC, Health Check, Central management, LACP, LBT, Netflow, and so many (features with fancy abbreviations) more). Especially if you want to move to NSX the distributed switch is mandatory. Since analytics showed me that views about my vDS blogposts are increasing it seems that there is a demand for the vDS within our virtualized environments (it’s still an enterprise+ only feature)