A few examples of products that have become services:

1. Music: Before you bought a CD, now you have a subscription to Spotify or Apple Music
2. Storage: Before you bought a hard drive, now you rent space on from a cloud storage provider (iCloud, Dropbox, Google Drive, Box, etc.)
3. Transportation products: Before you owned a car (product), now you can pay to go from A to B with services like Uber
4. Fashion products: Before you owned expensive dresses (product), now you can rent them for usage on services like Rent the Runway

To go deeper in that topic I recommend that you read the wikipedia page about the Sharing Economy.