So over the past several years, the key features in defining what makes a phone a key flagship has been constantly changing. The hottest thing since the iPhone 4 has been pixel density. Also, upping the processors to quad-core and even octa-core in Samsung's case. While these are all welcome, I feel we're at a point where the 1080p panels found on smart phones are very good, the software and hardware are optimized so that nearly all phones run smooth on iOS, Android, Windows Phone, etc. I believe the next evolution we need to take in portable devices (Laptops, Tablets, Phones, etc.) needs to be battery life. With the exception of a few devices (Droid Razr Maxx HD, Note 2) most devices that come out seem to have the standard target battery life. Such as for MacBook's I believe its around 8-10 hours of battery life. I get the feeling that make these phones with the strategy of "Let's make this next generation as thin as possible while maintaining the same battery life." Instead of making the phones thinner while maintaining battery life, I feel it would be much more effective for them to make the battery life much longer, while maintaining the same dimensions. What do you guys think? For example lets say the Galaxy S4 get's 10 hours of battery life currently (random number).. would you rather the Galaxy S5 be half the thickness, and still get 10 hours.. or be the same size and get 18 hours? Within reason, I just think a larger mAh battery > making the phone as absolute thin as possible.