Proposed Primary Appliance The Master Home Clock

Why hasn't anyone addressed the major pain-in-the-backside of appliances? I'm speaking of the House Master Clock. The one, needed appliance to grab the time from either the telephone company, the unused scan line 21 on the television sets, , the National Bureau of Standards radio transmissions, or your cellular phone or computer via WI-FI or Bluetooth? Everyone knows that in a power outage, you have to go around and reset all the clocks that aren't backed-up by battery circuits that allow them to 'freewheel' through the outage time. The clock , like a cordless home phone should see how many devices respond to its' stepped address queries, and every device should have a unique address. Since power loss is the problem, the communication should be through carrier-current over the power lines, or some newer version of Data over Power. Maybe it's easier to mandate that the power companies provide this service, and it will simplify the electronics all the way around, and simplify life for all of us affected by power outages. The implications can be important to mundane. If your microwave doesn't show the right time, it's only annoying, but if your timers are off, your security lights don't go on, leaving the premesis in the dark, even when power is restored. At any rate, you have to go around to each room in the house and reset everybody's clocks, and the appliances in the kitchen - especially the stove which you want to fail-safe off in the case of a power outage so that the automatic timer never can turn the stove on at a time when you don't expect it.