Simply put, this app offers everything that the original Xperia Z1 has to offer, nice & smooth UI, homescreens and lots of other stuff, check the screens below:
As you can see, the Xperia Home works with transparent status and navigation bar, which is a cool new feature from Android 4.4 KitKat. App comes as an APK file and doesn't require root to work. Be sure you're running on KitKat, tho.
If you like to install add ons like music, clock or weather widget, you can also install them as normally or flash using recovery.
If any link does not work, drop me a line and visit the original XDA thread and check for updates there.