When discussing relative prioritisation of items across multiple products with senior management I produce a single pivot table to provide a view of the top say 10 feature requests across each of our products, together with their individual scores based on an internal scoring mechanism.
As each of the products has stories with different prioritisation scores I cannot directly use a score cut off point to show the top 10 items for product A, product B, etc. and instead have to achieve the same effect using tags. Ideally I'd like the ability to show the top # of a ranked/scored list directly via a filter option to show the top items in each product.
If I am trimming items from an ever increasing backlog then the same mechanism could be used to look at the lowest priority items across all products very simply.
Being able to filter by Top/Bottom-ranked totals would be very helpful, especially for Dashboards. If you're able to filter a report by, for example, the top 10% of vote-getters, you can list that report on a dashboard and know that you're always seeing the top 10%. Some other examples would be building a report with the top 10% of Idea submitters, top 10% of Feature Estimates in a Release, or the bottom 10% of work done on Features in a Release.