vSphere 5.5 is now available with myriad small improvements such as a faster Web Client, LACP, Autoscale, and higher configuration maximums, and the goal is to point out the few changes that might apply in your company or organization.
In addition, there are changes coming such as VSAN, which may be ground-breaking in regard to VM storage of the future. Since the release of vSphere 5.5, they have not yet announced a change to the blueprint for the test. That being the case, for now, the VCP-510 test should remain unchanged as well. The goal here is not to reeducate you on everything that you need to know for the test; instead, it is to point out the few changes that might apply in your company or organization.