With Smart HD, iOS gets a great addition to it's UI and icons.
It doesn't redesign the original UI completely - it adds nice and clean elements to it.
The first thing you will notice is the icon mask which fits perfectly to every icon! Also you will be impressed by the changed loading screens, Apple's customized clean user interface with the colors blue, white and grey, and a nice MediaPlayer which makes listening to music an eye candy and other small changes.
If you enjoy simple themes as much as I do, Smart HD is perfect for you!
Please keep in mind, that it does not work on iPads or on SD devices like the iPod Touch 3G.
Smart HD is designed for the iPhone 4/4S!
If you have requests, contact me via Twitter: @CallMeFisK
Smart HD is my first theme on Cydia, and I hope you like it! More themes and updates coming soon!