Hand-waving away ride-sharing as not much of a change makes me wonder what you would actually consider to be significant. It completely upended the taxi business.
2007: arrive in a new city, figure out who to call (or maybe text) for that particular city, wait, hope someone will pick you up and understand enough of your language and the local geography to get you where you want to go, possibly some unpleasant haggling over the fare
2026: arrive in a new city/country, open Uber, specify in the app precisely where you want to go, choose a vehicle, when to get picked up, etc, track vehicle progress in real-time, up-front pricing
And that's the consumer side. The provider side was even more radically changed.
If you don't see how smartphones changed the experience of flying... maybe you don't fly anywhere?
Airtags are entirely dependent on the ubiquity of smartphones.