I am interested what comes from this thred. My only root was this new galaxy tab 2 which I got with my gs4, which turned out to be a waste of time since there arwnt any roms for it, but atleast I got some experience of a root. From what I understand. When you do root, it gets ride of the whole phones every thing, so everything would be say the CM rom. I read that somone was concerned about the camera features, I really love the looks of what I have seen with the CM rom. But for me I wont root if I cant get to use the incredible phone features. I have 2 daughters so getting to use the camera features to get to record them growing up. From what I researched for my kindle, it is possible to root but do a little switch off the root to be able to use the amazon prime. This. Would be something for me, I could use the CM rom, then " switch it off" to use the. Samsung camera. But of course that would not word if it was a long hard time consuming process, when needing to grab the phone for a quick capture of my daughters doing something I wanted to reco3d or take a picture. For me it would be a dream if it were an option to turn roots on and. Off like in the pull. Down menu.
"You keep using that word...I don't think it means what you think it means"
In all seriousness, I think your concept of "root" is a little mis-lead...
Root simply means gaining "root" access to the device, similar to having administrator access on a windows computer. In and of itself, root doesn't change the firmware or ROM you are running -- it's just gives you access to modify system files (such as remove "bloatware" and backup apps) as well as install custom recovery partition in order to install custom firmware, a.k.a. ROMs.
If you were to root your GS4, you would not "lose all the incredible features", unless you specifically installed a ROM that removed them, like CM (CyanogenMod); there are also plenty of ROMs based off of Samsungs official firmware that keep all the features. I'm not familiar enough with the Kindle to follow exactly what you're saying, but root isn't something you can "switch on and off", nor do I know of anyway to setup a "dual-boot" scenario, again though, rooting itself isn't tied to any firmware.
I'm currently rooted and running CleanROM, and still have all same GS3 camera the device came with.