An interesting read, a little off topic but relevant:
Ten years from now, Tesla Motors Inc. (TSLA) will NOT be about cars. Instead, it will be about the battery that powers them, and we will all say that Elon Musk saw the future as clear as Galileo. - See more at:
http://www.equities.com/editors-desk/stocks/technology/why-apple-is-likely-to-buy-tesla