Now that we can use the internet to access almost anything you’d want to see and/or hear, we should make museums that archive different smells. You could find new smells you might have not experienced otherwise, or find some nostalgic smell to bring you back to a moment in your past.
I’ve wanted to start one for a while. The big challenges are keeping materials fresh, avoiding cross contamination, and olfactory fatigue. There are some fragrance molecules that really fatigue your olfactory nerves and it can take hours before they become detectable again.
Actually this makes things even more interesting imho as it allows or even demands a sophisticated museum and exhibition concept.