Not only will the Galaxy S IV be thinner and lighter, the overall design, if rumors are to be believed, become more streamlined. Not that the Galaxy S III was a cumbersome tool, quite the the opposite. To make room for the larger display, word is Samsung plans to remove the ubiquitous home button found on the bottom of previous models. While this may disorient most users, it'll be interesting to see what Samsung plans to do with the new space and what software solutions will be used to replace the button.