Some clients have expressed interest in having support for conditional formatting rules on Master/Detail View pages, and the Inbox and My Task pages as well. Conditional Formatting can be a valuable tool on the new page layouts, just as it is on pages where it is currently supported - useful to highlight important items or call attention to things that need it, based on a given set of criteria (past due date and not Final, for example).
To add your support for this feature request, click on the "Me Too!" link below, and feel free to add comments with any additional use cases or details.