[throwaway4aday]

I think integrating existing devices and new ones is the way to go. With high resolution, color passthrough you can easily use a keyboard and mouse. Even better will be adding tracking to devices that you can use in VR. This already exists for a small selection of keyboards when using the Quest but could be expanded as needed either with purely visual tracking or base stations ala Vive or even using inertial tracking (like the IMU in your phone). For some applications using the VR controller as a laser pointer is more natural and faster than using a mouse, I'm sure the hardware and UI design will evolve to maximize this utility.