The device would include TouchWiz 5 running on top of Android 4.4, and instead of a notifications bar on the lock screen, actionable notifications would pop up under the user's picture. The notifications shade still comes down with a swipe from top to bottom. This concept offers support for voice commands.
The real Samsung Galaxy S5 will surely not look anything like this, although we should see a metal body for the upcoming year's version of the flagship Android device. If you want to see a closer look at Kaymak's concept, check out the slideshow below.
Samsung Galaxy S5 concept
source: +HasanKaymak via GottaBeMobile, ConceptPhones, AndroidAuthority