Samsung has steadfastly stuck to its guns with the Galaxy S5, keeping the plastic construction and body from the previous generation and only altering the back from shiny plastic to a vinyl-like back cover.
As a consequence, the Galaxy S5 looks cheap compared with some of its metal- and glass-clad competitors, particularly the HTC One M8 and the iPhone 5S. It also looks almost identical to the Galaxy S4, but with a dimpled plastic back that feels a bit like the vinyl seats you get in airports. The Galaxy Note 3 released in October last year had a similar textured back.
Consensus bottom-line is the S5 is a decent upgrade for those poor sods languishing in the Samsung Galaxy universe. It looks cheap, it's hindered by Samsung's software embellishments, and it still doesn't offer a flagship-worthy camera, but for some reason it will still easily outsell other Android offerings from companies like Sony, Motorola, and HTC, where at least their design teams are at least pretending to give a damn.