vSphere 6
I recently attended a meeting with an Oracle representative, who claimed that running a separate cluster was not sufficient isolation when vSphere 6 is implemented, due to the vMotion enhancements which allow VM portability across clusters with no shared infrastructure.
I highly doubt this is a defensible legal position and believe it is FUD, but it's interesting to see the latest tactics are.
Let's pretend this rule is real for a second, using the example in the article, not only do you have to pay for all of the car parking spaces in one car park, you now have to pay for all car parking spaces, in all car parks, globally, since you could in theory park there... It's just madness.