The No.1 endangered technology, Harari said at the Reuters Global Technology Summit on Tuesday, is the Blu-Ray DVD. Because the discs don't work with smartphones, which consumers are increasingly using to watch video, Harari says their days are numbered.
He did not give a time frame for this extinction, though he did note at one point that the average period of time it takes for a new technology to render an existing technology obsolete is five to seven years.
Floppy discs, once a standard component on PCs, have been replaced by flash-based USB drives. And photographic film for cameras has become a fading memory since the advent of digital cameras.
Of course, SanDisk has been striving for several years to make inroads in the market for music CDs, offering prepackaged tunes on its flash memory cards, but CDs have yet to disappear.