The Android 5.0 Lollipop for Galaxy S5 brings a new TouchWiz-ed interface that is very changed comparative with previous version of Android version 4.4. We have new animations, a Google Search Bar in the Recent menu he brightness slider in the notification area has a new color, “Interruptions” has been removed from Sound settings, the Gallery has new filters, Contacts has a new search box, and stock apps with Material Design get the colored status bar.
The Android 5.0 LRX21T for Galaxy S5 is already available in countries like Poland, Spain and South Korea.
So, if you do not receive yet any software update alert on your device, you can check if the update is available by checking manually from Settings Menu.
Below you can see a video demonstration of Android 5.0 Lollipop running in to a Galaxy S5 device.