it is not a big deal when she says grabher wants to talk to you. >> at&t.ch someone. john: due to creative destruction it is cheaper a ted minute phone call used to cost $11 now is basically free. lifo replaces takeout menus. rolodex. this used to sit on my desk and also eliminates snail mail. fax machines. paper maps gps. compass. music machines i was excited to buy this big thing when i was the kid in if you wanted that thing called stereo. ♪ as low was $129 that is $1,000 in today's money. a smart phone essentially replaces everything in this advertisement and that cost more than $5,000 and even that was an improvement things too rapid creative destruction of the music industry's. , the stereo replace the gramophone and cassette players. boombox is. smaller boom boxes been a much smaller box. >> most people just see the empty box but somebody saw something quite different. ♪ the only cassette player as small as the cassette case. john: the walkman was replaced by the mp3 like the i pied then it is all in my phone for a few hundred dollars her is a bargai