David Rushkoff : Web giant Google bought Tumblr for $ 1 billion to attract young people . He says kids use mobile Web far more than desktop that requires heavier hardware . Now that it 's been bought , Tumblr risks becoming uncool , he says . Yahoo : Younger people are much less likely to connect to the net -- or to each other -- through these cumbersome devices than they are to use smartphones . Users ' tweets about end of an era show signs of being bought by Yahoo .
David Rushkoff : Web giant Google bought Tumblr for $ 1 billion to attract young people . He says kids use mobile Web far more than desktop that requires heavier hardware . Now that it 's been bought , Tumblr risks becoming uncool , he says . Yahoo : Users ' tweets about end of an era show signs of being bought by Yahoo .