If the washer and dryer shared one outlet, manufacturers could programm/sync the appliances so that the dryer won't start until the washer has finished heating - or the dryer could run on a lower heat setting while the washer heats.
I don't think heating elements are on their way out... but they might be replaced by alternatives like heat pumps. V-Zug already has a dishwasher that combines both heating methods and can still run a full cycle (2x wash, 2x rinse, dry) in 43 minutes if needed. They also have a washer with heat pump and regular heater.
I don't think heating elements are on their way out... but they might be replaced by alternatives like heat pumps. V-Zug already has a dishwasher that combines both heating methods and can still run a full cycle (2x wash, 2x rinse, dry) in 43 minutes if needed. They also have a washer with heat pump and regular heater.