Virtual Desktop apparently lets you do basic controller emulation with Quest hand tracking now. It's nearly on par with the controller emulation you can do with a Leap Motion, although it doesn't look like you can emulate an Index controller to fully use the hand tracking yet. [spoiler]I still don't feel like this is a good way to actually play games though.[/spoiler]
https://uploadvr.com/virtual-desktop-oculus-quest/