I must confess I did something similar a long time ago, when hard drive space was expensive. I converted all my 4MP photos to 1024x768 - that was the biggest screen resolution imaginable at the time on the "huge" 17" monitors. Everything bigger was just megapixel race.

Fast forward 10 years and I still have all the resized photos in my phone (cloud), but even the small phone screen is so good that you can easily see the difference.

I've also noticed that people's habits change, I see more and more people flipping trough pictures on their phones and zooming in on the ones they like.

Who knows what picture viewing habits we will have in 10 years. Maybe with some VR implants we will want to enjoy our old photos in all glorious 12 megapixels.