Comment by _ph_

The point isn't that Lithium Ion batteries are that great, but that most of the press articles are hyping something which at best is a few years in the future. There is a huge gap between even the best science and a technology which is ready for production and can be rolled out into large-scale manufacturing. Even if there are for-real samples around for people to play with, it could take years until they make it into a car. And then of course, there is some risk that the initial science isn't even good. That happens too.