The number one thing Tesla has to do if they want to become part of the mainstream is to get the United States Government to establish standards for car batteries. The downside to this is that it limits innovation. However, without the ability to swap batteries at "battery (gas) stations" electric cars will stay in the "early adapters" phase indefinitely. The alternative is to develop a cost effective battery that can last for a very long time (read: 500+ miles) which actually might be in the near future. On a side note, I wish Tesla sold gas hybrid cars because I love the design.