The April 2, 2013 issue of Automotive Engineering International has an article with Tesla's CTO discussing their engineering culture. He also discusses future developments, which can be summarized as: 1) more software configurability, such as driver adjustable regen 2) replace exterior mirrors with cameras. Tesla is working to convince regulators to allow this 3) lower cost, more energy dense batteries. "If you look at the physics, there is no good reason why better nanoscale engineering couldn't make a battery with energy density approaching chemical fuels." 4) tesla will continue to offer a choice of battery sizes Here is a link, but it might require a digital suscription to the magazine to work: Login to SAE International GSP PS. The link works for me, and takes me directly to page 20 where the JB Straubel article starts. However, I have a suscription to the magazine and probably automatically logging in. Does the link work for anyone else?