I'd like to suggest a new feature for a future version of Views: the ability for multiple views to have the same path for their page displays, with the capability for Views to determine which view the path is referring to based on arguments (the determination part would, presumably, be PHP code entered by the administrator, ala argument validation in Views 2).
For example, two views that both have the page display path "cars/%". If the URL "root/cars/1968" is accessed, Views runs some (admin-specified) code, determines that the argument is numeric, and displays the view "cars_from_a_certain_year". On the other hand, if the URL "root/cars/Lotus" is accessed, Views runs some code, determines that the argument is non-numeric, and displays the view "cars_made_by_a_specific_company". Both of these views, "cars_from_a_certain_year" and "cars_made_by_a_specific_company", would have the same page display path ("cars/%").
I think this could be beneficial, since it more closely mimics how pages might be laid out in an actual directory structure and shortens paths for page displays.