From my timeline today.
Nothing really earth shattering in the article, just a nice summation of where the battery tech is at and how Tesla's push to leverage existing technology (the same that Ford is using) might be the best approach.
One bit of information I did gather was that IBM walked away from Li-Air this year. I did not hear that this approach was struggling. Good news is that battery prices continue to drop, and chemistry keeps improving range if only a little bit at a time.