Although, Microsoft has decided to drop Aero Glass UI in the final release of Windows 8 OS (see details here), fans of Aero experience can still enable this translucent window experience (Aero Glass) in Windows 8 with a little trick (Aero was first introduced in Windows Vista and then in Windows 7). Interested users just follow as described below to get Aero Glass in Windows 8.
-Right-click on the Windows 8 Desktop and select “Personalize” option.
-Select “High Contrast #1”, and then click “Window color”. Do not click “Save changes” or “Apply” option and leave the window open.
-By keeping the above window (Window color and Appearance) open, once again right click on the desktop and choose “Personalize’ option.
-From the personalization window, select a default theme. When it saves your selection, click on “Save changes” option in the first window (Window color and Appearance). That’s all! [via]