Windows 8's new Metro interface has received a lot of attention. You can add this theme and interface layer to Windows 7 with the Rainmeter theme pack. Below is an article on how to do this.
Omnimo 4 Port Windows 8 UI In Windows 7
Fediafedia released Omnimo 4 skin freeware which exactly brings Windows 8 Start screen for your Windows 7. If you don’t know at D9 conference Microsoft unveiled user interface for Windows 8 for touch devices like tablets tile-based Start Screen is a feature aimed at touch screens replaces Start Menu with customizable, scalable full-screen view of apps. Omnimo is a multifunctional interactive desktop
information center based on rainmeter and will turn your desktop into a
productive and attractive workarea , delivering only the information
you need. Omnimo 4 is a skin for Rainmeter,
a desktop customization platform that features tools that can display
various information on desktop and every interactive tile gives you
information at a glance, and can be easily customized to your needs.
Once after installing Omnimo 4 over Rainmeter pack you can select Windows Phone 7 or Windows 8 skin accordingly and for Omnimo 4 to work on Windows 7 you should have Rainmeter 2.0 or higher installed. Download Omnimo 4, here.
http://fediafedia.deviantart.com/art/Omnimo-4-1-for-Rainmeter-158707137?
http://rainmeter.net/cms/
Steps to install Omnimo 4:
1. First you need to install Rainmeter 2 or higher in your Computer. Installing Rainmeter 2.1 Beta is better as it adds Aero Glass, NowPlaying and Twitter functionality.
2. Download Omnimo 4 skin pack, extracts its contents to a folder, double-click SETUP.rmskin to install Omnimo 4 .
3. After the installation, from Omnimo 4 setup screen select your settings then select Start Screen theme from Windows Phone 7, Windows 8 Start Screen and Blank theme after that, click the highlighted resolution and you’re done.
4. Your Windows 8 Start Screen for Windows 7 is ready, you can add or
remove by clicking + button on the desktop and then click on the panel
you want to add.
Omnimo 4 works on Windows XP but Windows Vista/7 is required for Aero glass effects
and after installation, select your settings and then the
theme+resolution to apply the optimum layout. Don’t worry if your
desktop resolution is not included and you can move things around to
your liking anyway.
ScreenShots by chip.de:
Source: http://thetechjournal.com/electronics/computer/software/windows/omnimo-4-port-windows-8-ui-in-windows-7.xhtml