Yup, I think this would be the second step, once the beginner is used to the bare letters on the staff. This introduces extra visual noise, but begins to teach the player what standard notation looks like.
With software, the view can adapt over time as the player becomes more comfortable reading notation. If the sheet music was displayed on a tablet, eventually the little letters could disappear.
This could be a nice set of "training wheels" for beginner pianists.
