For a decade or two, for most people 'the internet' meant a web browser, a mouse and a keyboard. There were a few things around the edges, like IM, Spotify, Skype or Steam (or, for some people, email), but for most people and for almost all activities, the web was the internet. The web was the platform, not the PC operating system - people created services for the web, far more than for Windows or MacOS.

http://ben-evans.com/benedictevans/2015/9/26/mobile-is-not-a-neutral-platform?utm_content=buffera4489&utm_medium=social&utm_source=twitter.com&utm_campaign=buffer