Well, Test Subject LLC. has brought this feature to the table as an optional feature, which could be added to their upcoming game Ascended.
Let's watch a short video, which might explain this feature better than words could:
So, as Texas has explained here, this feature is currently developed for FPS games, yet, it can be brought to the RPG scene as well, which I, personally, find pretty useful so that you can focus on the keyboard while playing, leaving the camera movement functionality to the movement of your head.
So, as Texas requested on his video, what would you think about this feature being added to the RPG scene? Would you find it useful, or tedious? Would you rather use this than your mouse?