For me all of the previously mentioned specs from the screen quality to the camera & hardware were pretty much tied with the htc One whick I think is the other top Android device available right now.
The build quality of the the htc One is the best I've ever seen but the lack of memory expansion & non-replaceable battery plus the fact that blinkfeed on the htc couldn't be turned off sealed the deal for me.
I'm not really interested in rooting so that stuff is a non-issue for me. All phones will end up with some type of security or efuse technology because it will help to gain market share in the corporate world.
As far as lag, I haven't noticed any at all. Then again, I speed up the transitions and animations using the developer options.
I wouldn't have minded if the home button was a capacitive button though. Capacitive button don't really wear out like physical buttons often do.
The fact that the S4 has an amoled screen is another plus because they tend to use less battery that lcd screens especially when using a black background.
