All Google APIs that supports OAuth 2.0 should work with Service Accounts.
However the 3 products listed above (Cloud Storage, Prediction API and URL Shortner) are the only ones with which it makes real sense to use Service Accounts (i.e. on behalf of your application) all other Google APIs are here to access user's data. You can read the first section of the Application Owned Accounts Drive documentation for more explanations.
PS: the part of the announcement that said Google APIs Client Libraries for Python, Java, and PHP
was meant to say that only our Java, PHP and Python client libraries had built-in classes to use Service Account authorization (the Client credentials flow of OAuth 2.0). Now most of our client libraries have support. Check the code sample in the referred documentation for the full list.