While what you're saying about CPUs is correct, that is not the main battery hog in smartphones (additionally why Apple is staying so far from LTE at the moment

While what you're saying about CPUs is correct, that is not the main battery hog in smartphones (additionally why Apple is staying so far from LTE at the moment) The biggest demon is by FAR the radios. The amount apps and the phone use that is mostly determined 1> by how much the user wants notifications (which are basically implemented by constant polling, even in background notifications), or 2> how network intensive the apps are that a person is using. Additionally, stuff like having bad connections to your cell provider make the radio receiver power have to be turned up (as well as broadcast, but the receiver is the worst part usually), and constantly using bluetooth will kill you as well. The bad thing about the radios, especially if you have stuff like lots of apps doing push notifications, as well as a fast polling interval for your mail, is that you're doing this even when the phone is in your pocket. Second to the radios is technically another radio, but people only do 1 way comms with it and don't really think of it as a radio: THE GPS SYSTEM. Apple vastly improved this (it used to pretty much leave the system on, now it pulses it on and off unless your app requires the older mode for some reason, such as Navigon type turn by turn navigation). Again, this is a part of the phone that optimization did help with (as often time the GPS radio doesn't come on if the phone can figure out your location from other mechanisms), but still, you're generally speaking going to see most GPS heavy apps running while the user is using them. Sure driving faster will get the phone in their pocket faster, but I'm not sure an added hour of battery life is worth unsafe driving. I'm not saying graphics and the like don't eat up huge chunks of power, I'm just saying that a vast majority of people eat most of their power on much more pedestrian things than Infinity Blade.