If I use WhapsApp or the weather app on my mobile or a VOIP phone I'm also using the internet but would never all it internet because that's a app and I (usually) don't care how data flows in the background.
Yeah. Internet is becoming more and more an implementation detail, an invisible but omnipresent infrastructure behind most telecommunication services instead of something you use explicitly - let alone "visit" like in the dialup days. Walled-garden worries notwithstanding, I don't think this trend is necessarily a bad thing.
People don't know the definition of the word Internet. But then again, the Internet has become more and more AOL'ified ever since that long, long September ..
What I find frustrating is that people in my circle are less and less inclined to send me an email and would rather just post a message on my wall. Its getting to be pretty infuriating, to be honest. Trouble is, I don't see any way around it - until some other competing service comes along to replace Facebook, just like happened with AOL and Compuserve. But I think we're a long way from that.