It might just be a matter of time until advances in miniaturization make wearable cellphones alot more feasible, but in the interim Motorola is working on splitting up the phone up a handful of different devices (possibly using IXI's Personal Mobile Gateway technology, though the article doesn't specifically say).
Smart cities and homes have gained extra urgency in recent years because advances in technology now makealotof innovations like shutting off your air conditioner from the car practical and economical.