Cities of the future

I select the "Cities of the future" from 6 minute English, which is the most attractive in  my first sight. What will the future looks like? We can imagine infinity. Cars fly in the air, robots walk on the streets, nobody need to go out for work just work at home...... That's possibility not dreams any more. The technology's advancement is more quick then our think. We need to prepare to face the word's change anytime