Microsoft has already unveiled the New User Interface (UI) of the upcoming Windows 8 OS. The Windows 8 Start Screen is a Tile Based Start Screen which replaces the Windows Start Menu of other Operating Systems. These tiles are customizable and provides notifications, information about installed applications etc.
The Screen Shots of Windows 7 and Windows 8 OS are given below so that you can feel the difference between Start Screens of both Operating Systems :
How to get Windows 8 Start Screen in Windows 7 :
Step 1 : Initially, download the Rainmeter Software and install it.
Step 2 : Now download a skin, say Omnimo 3.1 for Rainmeter.
Step 3 : Install the skin i.e., double click Omnimo.rmskin file.
Step 4 : Once the skin is installed, run the rainmeter and you can have the tile based view of Windows 8. Now, you can customize the start screen like adding panels, arranging them in the order you wish etc.
This is it and you have Windows 8 Start Screen on Windows 7.