1900: "Phone before you drop by." 2000: "Email before you call." 2010: DM for email address. What next?
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2020: Doorbells are now found in museums. People use Snapchat to announce to friends and family that they are at the front door.
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If my machines are not already talking to your machines, I don't want to see you.
If they are, they'll tell me you're on your way.
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2020: Intelligent personal assistants connect and decide if the human even matters
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My AI will Bayes your AI to verify further contact is warranted.









