In a year's time, every record currently in the UK Top 40 Singles Chart will have dropped out.
In five years' time, most of those artists will have also vanished without trace.
In fifteen years' time, everything you think you know about fashion will be laughably incorrect.
In fifty years' time, any movie star you can name today will be forgotten.
In a hundred years' time, every single piece of technology you own will be obsolete.
In two hundred years' time, prominent world leaders like George W. Bush will be as unfamiliar to students of the day as President Zachary Taylor (1784-1850) is to us.
In a thousand years' time, Shakespeare will be just another piece of ancient history, as relevant as the Iliad.
In ten thousand years' time, everything you see will be gone, everything you know will have changed beyond recognition, and everyone you've ever heard of will have been forgotten for ever.
Fine, fine, I generalise, I make sweeping statements, I am melodramatic. But seriously. If you really, and I mean REALLY want to live forever, there is only one way to do it. A mathematical equation stands forever.
The node title is attributed to Pál Erdös.
flyingroc raises some excellent points. There are other ways to immortalise yourself, of which starting a World War or being the Son of God (or both) are but two. But tell me, which one do you have the best shot at? Ah well. We'll see who's right at the end of eternity.