this is related to the hierarchical grouping coming in 1.9. https://shotgunsoftware.zendesk.com/forums/31278/entries/27446
originally i posted this there, but since it's large enough in scope to constitute its own feature, i thought i'd spawn it off as a new topic. so, i apologize for the double posting.
when grouping is enabled, it would be HUGE to have a new view (along with list, card, thumb, etc ) that is a 2-pane iTunes-style navigator, with the hierarchical groupings arranged left to right in the top pane and the filter results in the bottom pane. these hierarchical groupings are essentially the most common filters for whatever you're displaying.
For the tasks page i might choose Sequence, Link (aka shot/asset), Type, Artist. from there it's just like itunes: each column has "All" as an option so i can use any combination of filter or even select multiple items from each column. I might choose a single sequence, then several shots, and then 'lighting' and leave artists at 'All' to see all lighting tasks for certain shots. or i might leave Sequence, shot and type at 'All' and choose a particular artist, if i want to see everything that is assigned to a particular artist.
IMHO, this feature would completely rock. it provides dynamic filter application in one page, removing the need to create a separate page for each query, and it's an interface people are familiar with.