LiOn batteries powered hybrids is a short term solution. Super Capacitors are a much better solution once they get the recipe right.
And, they can be recharged in seconds/minutes. Not exactly sure thats feasible with household voltage/current, but I'm sure that will be dealt with in due time.
Here's one article discussing a recent super cap breakthrough.
http://www.extremetech.com/extreme/1...h-a-dvd-burner
Tesla seems to be headed towards Super Capacitors.
http://www.greencarreports.com/news/...-car-batteries