Here's my take on why the S4 is "lacklustre". It doesn't look much different to the S3 and that's all people care about, the looks. It doesn't matter how much better it is inside, people want others to instantly know they have an S4 just by looking. People called the 3GS and the 4S "lacklustre" but the iPhone 4 was "amazing" because it had a new design.
No this is exactly what apple sheep do and they could care less about what the inside is all about.
android users will buy the gs4 for its guts and hardware and run custom kernels and roms on it taking advantage of the next gen hardware in it.
someone in one thread,might even of been this one called siri a main upgrade to the 4s when that very same software can run just fine on an iphone 4
for some reason some people here would of rather had a radical looking new phone with the same exact hardware with a minor spec bump because that is what you are all used to.
for some reason if Samsung made the cell look like a Ferrari and made out of carbon fiber but shared the exact same specs as the s3 but clocked 100 MHz faster you would all praise the hell out of it,but Samsung being the first company to use arms cortex purebred a15 cores is nothing and gets over shadowed by the fact that a Samsung galaxy phone shares resemblance to a galaxy phone from the past,I mean it is a galaxy s phone for gods sake.What exactly did you people want the phone to look like?
let me say it again,this is next gen arch in the gs4