Enterprise Content Management solutions require the management of many types of file formats.  SharePoint handles that just fine.  What it lacks is an out of box viewer of various file format.  This functionality that is bundled with some of the other pure play document management system is now available to SharePoint customers. 

Informative Graphics Corporation has a multi format viewer and markup tool that works with SharePoint.  This is the same viewer people are used to using with other document management systems.

Press Release from 2007

https://www.infograph.com/press/brava53sharepoint2007.htm