I still prefer the idea of a private cloud inside a company where database services are provided, not database instances.
There it is, I agree. At least for large enough companies where it makes sense.
I still believe cloud services are way to limited for now, if you look at more than only the database part. Which makes migrating from and to a huge issue.
Renting an ordinary virtualized server is so much easier for existing systems if you dont want to handle hardware yourself, in my view.