Years ago everyone took pictures on holiday. The shutter wasn't clicked too often because film and processing were expensive and there was no preview prior to printing. Cameras were either small compacts or bulky SLRs. Things are a little different now.
A camera can be something we'd recognise as a camera or a phone or tablet. People even use GoPro video cameras for stills.
And it used to be the Japanese for whom the people in the picture were more important than the scenery but now everyone is the master of the selfie.
The quality of pictures seems less important and the secondary cameras on mobile phones and the poorer quality cameras on tablets are even preferable for those seeking a flattering self portrait. The selfie stick is something I've noticed for the first time this year. It's not just a monopod but a way of snapping a picture of oneself and family or friends without having to ask a passing stranger for help.
Another reason that quality is less important is that photos can be edited almost immediately.
I also think photos are more transient. We all used to treasure photos and place them carefully in albums. Now our albums are online, uploaded, shared and forgotten.