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Last Thursday, April 30, this happened in Los Angeles, USA:
It´s the official launch event of the Tesla´s “Powerwall” home energy storage system.
“Powerwall is a home battery that charges using electricity generated from solar panels, or when utility rates are low, and powers your home in the evening. It also fortifies your home against power outages by providing a backup electricity supply. Automated, compact and simple to install, Powerwall offers independence from the utility grid and the security of an emergency backup” 
“The missing piece” from the technological point of view, able to render obsolete the current electricity supply system and threat the existing market.
A technological, economical, social, urban planning, environmental disruption.
We will talk a lot about this.
References:  TESLA. Energy Storage for a Sustainable Home. http://www.teslamotors.com/powerwall. Consulted 3 May 2015.