While PDF and DWF formats are fine, Revit really needs a standalone viewer or the modeling engine integrated into Volo View.
This would mean that other employees within the company can get access to your drawings for viewing and printing purposes.
In my situation, I am the only person running Revit, and if I am not available at work then nobody can get access to the drawings, due to login password restrictions on the workstations.
It would also mean that our sales and design managers can access the drawings by themselves without the need to continuously interrupt my work.
I could put a demo copy onto the required PC's but this still means they can't print, and would be overwhelmed by the revit interface and would soon give up. They are nearly computer illiterate users.
It needs only to be a simple interface that shows only Views which would include access to Plans views, Sheets, Sections etc, and also reports.