Check out this quick video that shows a bit of one song for each year of the last century (actually 1900-2009, but close enough!)
It's amazing to see it like this, but I won't say more. You'll want to experience this "fresh."
I wonder what the next video will look like, in 100 years from today!
This will give you a little perspective on your piano playing: Here's what I'm thinking about when you practice piano