Power users in analytical roles. Ones that have to manipulate data files, manage processes, synchronize or backup data and interact with the OS in ways that may be very foreign to them on Linix.
Again, why are they worried about what's going on at the server? SQL codes are SQL codes... Oracle is Oracle, etc. What you're talking about is normally handled by desktop apps, such as the Accounting app, or add-ons made from Crystal Reports, or Access, etc.