A nice example of what he suggested is the Materials dialog. At the top is a field to enter search criteria that the materials list will refer to and reduce the list according to what you type. Type W...you get all the materials starting with W. Type "WO" and you start seeing fewer items and it becomes much easier to see "wood" materials. Type the rest and you only get materials with wood in the midst of the name.
Imagine this same concept at the top of the Project Browser? Want a floor plan? Type "Flo". Want to see second floor plans? Type "Sec". The Material Class field allows us to chose a predefined class to restrict results in the list even more. This could be used to define floor, ceiling, detail plans etc. The results would be limited to just floor plans, or elevations by choosing the View Class.
Might even do away with a general listing of views? Considering 2011 has the Properties Palette and the Project Browser stacked it could make the Browser much more practical at a smaller footprint.
Very interesting idea Seena!!