This week Tesla has made an announcement that will really kickstart the battery storage at homes. The new Tesla Powerwall is a very well looking battery box that can be mounted to your wall and attached directly to your solar panels to store the power so you can use it when you need it.
Although they are not the first one to produce something like this, they aim at doing it a such an enormous scale (by opening a new factory which will instantly double the current world production of Li-Ion batteries), that it will have a big impact on energy storage.
The only issue with this is that it might lead to a lock-in of the inferior Lithium-Ion technology for batteries, whereas currently researchers are investigating many better options, with higher power densities at lower prices. The issue currently however is that these are by far not ready for the market, but it still means that research aimed at this should be funded in order to bring the world further (are you reading this European Commission?).
Still, for now I believe that this is a very good start for this, and that it will lead to a much bigger market for sustainable energy generation. So yay for Elon Musk and Tesla.