There were mobile devices in 1999-2000 such as the Palm devices that were easily capable of running a network stack, but what really changed in the last 15 year

There were mobile devices in 1999-2000 such as the Palm devices that were easily capable of running a network stack, but what really changed in the last 15 years is the deployment, improvement, and adoption of wireless data services - We had to wait for the network to catch up.