The year-on-year improvement of smartphone capabilities over the last few decades has given us the power to leave the house with nothing else on our person.
These mighty paragons of technology contain every piece of necessary information, contact capacity and entertainment to survive treacherous tube journeys and long days at the office. The only other requisite comes in the form of food and drink, and that can be foraged or gathered along the way. After all, the magical device also functions as a wallet, and for some smart-home owners, the keys to their house.
