My company uses Omniture to track usage for mobile applications on multiple platforms (iPhone, BlackBerry, Android), where a given application on a given platform has its own report suite.
For each of these platforms it can be very useful to understand which version of the particular operating system our customers have installed, as the version number indicates which OS features are available. If we have insight into this from the Mobile > Operating System report, it makes it easier for us to decide whether or not to continue supporting older OS versions, or otherwise direct development on the applications.
Ideally, for us the Mobile > Operating System report would look something like this:
...instead of just listing "Android", particularly since we only have one top-level OS per report suite, as a general rule.