I feel like in a TV metaphor VR is more like black and white TV and AR is Colour. Essentially VR and AR are 90% the same technology and design challenges, but

I feel like in a TV metaphor VR is more like black and white TV and AR is Colour. Essentially VR and AR are 90% the same technology and design challenges, but with AR you feature in the already existing 3D world around you and VR creates one.