In my opinion Samsung did a great job with the S4. People keep saying that its a copy of the s3, it has nothing new, samsung is pulling an apple, another cheap plastic phone etc.. to those people i would say - you are wrong.

1) Its not a copy of the s3. it shares the same design principles as the s3 but improves on them. This is not uncommon in the smartphone industry at the moment eg. lumia range, iphones, etc
if you still think the s4 is a copy of the s3, look at the following picture and tell me if you cant tell which is which


2) The s4 does have some cool new tricks that the s3 didnt have. I wont count all the software improvements because those will eventually be available on the s3. But how about the hover functionality? the ability to use the phone with gloves (Nokia was happy that no one else had that)? 5" screen in the same size phone? improved camera? IR transmitter? I wont say that these feature make the s4 a worthy upgrade from the s3, but at the same time I think its wrong to ignore those noteworthy improvements.

3) people keep dissing plastic as if it is no longer worthy of being used in premium products. those same people probably have a plastic case covering their iphone. thats all im going to say about that.