I think the ability to record a prototype walkthrough would be incredible. This would not be a video recording—rather an automated and guided click/scroll experience through a prototype. So you could record a walkthrough and then update the design and content; and you wouldn’t need to re-record the walkthrough like you would with a video/screen recording (barring any major changes), since it’s a live prototype.
I am totally agree, this is a future of prototype presentation + ability to add voiceover while recording a prototype.