The South Korean company recently explained why it chose to design the back of the S5 this way:
Samsung has a full Galaxy S5 design story over at its new design-centric website (we first told you about it in March) - you can see it in the slideshow below. Oh, and in case you were wondering if, like the S III and S4, the Galaxy S5 is also “designed for humans”… well, Samsung reassures us that it is. Whew!
Later this year, Samsung may launch a premium variant of the Galaxy S5, which should be made out of metal. Well, we're eagerly waiting to see what this one will look like.