Yes, we want to do something similar what you said: Edison as a keyboard or mouse to browse slides in PowerPoint. This is one of the use cases we plan to do with Edison.
We are using Eclipse IDE on Windows.
Well, you can add a USB keyboard or mouse to your Edison, then try to connect the Edison to your PC as a USB HID. You might need some drivers for it to work, but it is possible. Someone asked something similar in the Galileo forum, but I think you can make it work for the Edison. You can check it here How to connect Intel Galileo to PC as USB HID.
I guess he means like what you would do with an Arduino Leonardo where you can code a KEYPRESS command that would be emulated by the computer as a keyboard key being pressed.
Is it possible to do this with the Edison?