Speaking from Accessible point of view, this is a huge plus for blind/visually impaired users. One thing I can tell you, personally, is that I used Sonar vor video syncing of audio for my drum covers. I'd upload the video into a project, then import the audio from the recording, and use the camera audio to sync the video to the studio recording. I wonder if Reaper does something like that.
Anyways, I look forward to being able to help as much as possible with this. I am currently running on the free version, but knowing that this will be worked on, I will purchase a liscensed copy very soon, so that way I can have the newest version .