Companies are finally starting to put larger batteries in smart phones but it took way too long. Android phones should have had large batteries from the start. There were far too many phones with batteries smaller than 1500mAH. It's great to see high end phones finally moving up to 2000mAH and higher. Props to Moto for having a 3300mAH battery in a phone that's not really larger than its competition.
It's also great to see die sizes dropping! That can help battery life just as much.