If you're happy tinkering with your shiny Galaxy S4 and have no faith in Samsung to deliver Android 4.4 KitKat to your device any time this century, then you can get busy flashing a leaked custom ROM to get almost the same effect. An unofficial build of CyanogenMod 11 has appeared on XDA Developers.
Funny that this KitKat build has appeared just a couple of weeks after KitKat went live on the Nexus 5, while Samsung's official 4.3 update is only just rolling out to S4 owners on the AT&T network in the States, four months after it appeared on the Nexus 7. One of the most immediately noticeable changes is that this version of CM supports KitKat's transparent system bars.
The only things you won't see in the CyanogenMod 11 build if you flash it on your S4 are, according to the developer, the IR Blaster, screen rotation and proximity sensor functionality. Not bad considering Samsung's 4.3 firmware for the Galaxy S3 has battery issues, app crashes, device freezes and crazy instability. And they've been working on it for months, not weeks.
If you're ready to flash this unofficial build, head on over to XDA Developers and read up on the changelog, bugs and fixes before going ahead, because as always AndroidPIT takes no responsibility for any modding you do on your device. If you keep an eye on the updates and comments you'll be able to see when the missing functionality is added and everything is running nice and stable.
If you're a maverick who's flashed this KitKat ROM already, let us know what you think of the firmware in the comments below.