"What happens when all the things we based our icons on don't exist anymore?"

"Do they just become, ahem, iconic glyphs whose origins are shrouded in mystery?"

"When is the last time you stared at an hourglass while waiting for something?"

ADDED: A commenter, at the second link, answers the question: "Last time I played Boggle (real-life, shake-up-the-cube Boggle, not some online facsimile)."

I would have said: Last time I watched "The Wizard of Oz," and the "something" I was waiting for was: Dorothy to die.