The Samsung Galaxy S4 may have all the high-octane components you could want -- including a galloping quad-core processor and a great 13-megapixel camera -- but it's equally defined by its abundance of software features.
Samsung's Galaxy S4 jumps into the personal health tracking game with the S Health app. Also linking to the S Health app and Galaxy S4 via Bluetooth is a pedometer-style fitness band device planned in the future.
Android 4.2 enables lock screen widgets, which Samsung takes advantage of with a camera widget or favorite apps. You'll also have the usual lock screen shortcuts to open if the widget method requires too many swipes.
Deep in the settings menu, you can program a volume key to trigger the shutter button. You can also program video to speed up a recording or drag it out in slow motion, both to potentially hilarious effect.