Not an iPhone nor Apple user, but I feel like we're regressing on battery life. My old Moto G used to last a full week with single charge (yes, I'm a very light user: no social media, games etc.). My newer Google Pixel's battery, with its larger capacity, with the same usage pattern, lasts for 2 days if I'm lucky. That is to say, the normalized idling time for newer phones have grown significantly shorter.

Now, this Apple ad appears to be boasting as if battery that lasts single day is a generous offering. Perhaps it's adjusted for a heavy user. Still, I don't get the impression that we aren't getting actual improvements on battery life.