It didn’t invent the portable mp3 player - it just gave it an iconic style deserving of the artistry stored upon it.
It didn’t invent the smartphone - it merely created the first product that justified the term.
And it didn’t invent voice assistants, or self-driving cars, or wearable technology or whatever comes next.
It’s that - the whatever comes next - that poses the greatest threat to Apple, even if it seems untouchable right now. From this point on, to stay on top, Apple doesn’t so much have to predict the future, but perfect it.