A photograph behaves differently on a wall. On a screen, almost anything can hold the eye for a second. Light passes through it, the image arrives already illuminated, and another one waits beneath the thumb. Printed and hung in a room, it loses those advantages. Scale becomes obvious. So does weakness.
London is particularly good for testing this. At the V&A, photographs sit among objects expected to survive attention rather than merely attract it. That changes the way one looks. Paper, printing, size and framing stop being technical afterthoughts and become part of the image itself. A photograph that felt immediate on a screen can become surprisingly slight at two metres away. Another, almost quiet online, can suddenly occupy the room.
The difference is difficult to predict.