Windows 8 comes with a completely new graphical user interface. The interface was dubbed as Metro at first but then people got used to ModernUI name for the new interface. Windows 8 is yet to be released for general availability on 26th of October 2012 but geeks and MSDN/TechNet subscribers are already using Windows 8 Release Preview and Windows 8 RTM.
If you are a Windows 7 user or using Windows Vista or Windows XP, now you can easily transform your current Windows into the new shiny Windows 8 interface. There are a couple of tools that can be used to get Windows 8 Metro/ModernUI theme for Windows 7, Windows Vista or Windows XP.
The first app is WinMetro from IObit. Although the product is still in beta, it works on all the mentioned Operating Systems. It can be very useful to get used to the new interface even before you get your hands on the new Windows 8 system. WinMetro will turn your Desktop into a tile based based Metro UI screen. By displacing useful information such as weather, calendar, news, stocks, and frequently used programs, it turns your desktop into an informative and productive work area. It also offers the option to boot to Metro Start Screen directly.
The second app is MeteroVS, Modern UI for Windows 7. This app is specifically made for Windows 7. It is different from WinMetro app in that it transforms the actual UI like the taskbar, folder toolbar, colors etc. to the look a likes of windows 8. Here are some of the features of MeteroVS.
True windows 8 metro vs ported (So you will have the full metro experiences!)
no more gradients
simple, minimalistic ui to provide more fast and fluid experiences