I agree that smartphones are another revolution of comparable magnitude, but that started less than ten years ago: we don't even have a first fully-grown up post-smartphone generation yet.
Mobile phones, on the other hand, didn't change much. Before them, we used the ubiquitous payphones when needed. Beepers briefly became a fad, but that faded out even before mobile phones became common; most people just didn't need constant telephone availability.
So to impress a girl I made my PC dial me to ring my phone but it was the Fax app! I had to step away because I was afraid she'd hear the squeal of the Fax eeeeee!
One time probably mid 80s my uncle had a brick cellphone but was embarrassed to use it. At a Kmart entrance he went to the corner leaned on the wall with his back to everyone while he talked. As he was on the phone a little old lady was getting change from her purse. My uncle finished his call and left shocking the lady who thought there was a payphone on the wall.
Mobile phones are just incomparable to the advances the internet has brought. The internet put the whole world into high speed mode.
When mobile phones started coming out, they were just something rich people spent too much money on. Most people I know bought their first mobile phone when it became less than $200. When the internet became accessible on mobile phones (and I mean really accessible, not just loading slow terrible UX websites on nerdy HTC Windows Phone palmtops like I had), suddenly even the middle class spent upwards of $800 on their phones.
That to me signals how important they feel it is to be connected, not just one to one, but to the entire net. The smartphone is a device that connects you to the internet in a convenient manner, that it's a mobile phone is secondary to that from my perspective.