Last I heard, a modern day Smart Phone with Vacuum Tubes would require the space of the Washington Monument. Now imagine this new ARM's chip with Vacuum Tubes needing 3x the space! Curiously, a modern day laptop (without the new ARM's chip) would need the space of a tall skyscraper.

Thanks to John Bardeen, William Shockley, Walter Brattain of Bell Laboratories for the invention of the Transistor, Dec 23, 1947 - awarded the Nobel