30 years from now, that number might be different ... as in, "Who needs a TV? Isn't everyone getting their entertainment on tablets now?"
I've been listening to a lot of music from the 70s and 80s lately. And you can hear references to many things that no longer exist -- like the love letter, the answering machine, the complete obliviousness to things like social media or texting or the idea of a lack of social privacy among your friends who all have Facebook accounts and mobile phone cameras.
And yet at the same time I've encountered music that has no idea how prescient it was at the time. I was listening to "Ted, Just Admit It" by Jane's Addiction on my hike this morning. The whole idea of ubiquitous imagery and sexual violence and exposure has only gotten 5x worse than they thought back 25 years ago.