HT1872 - Print Size and the Wall

Once Stieglitz decided that photography was best consumed as art on the wall, like painting, he set in motion the pursuit of large prints. If it weren't for our predisposition to exhibit photographs on the wall, I wonder if there would ever have been a push for larger and larger prints. And if we collectively did not think of photography as something destined for the wall, I wonder what methodology/medium would dominate the sharing of photographs?