Grocery-carrying robots are coming. Do we need them?

By Matt O’Brien, The Associated Press
The first cargo-carrying robot marketed directly to consumers is on sale this holiday season. But how many people are ready to ditch their second car to buy a two-wheeled rover that can follow them around like a dog?
Corporate giants like Amazon, FedEx and Ford have already been experimenting with sending delivery robots to doorsteps. Now Piaggio, the Italian company that makes the Vespa scooter, is offering a stylish alternative to those blandly utili