Windows 8 boots directly into the Windows 8 Metro Start screen. Rather than seeing the traditional Windows Desktop, you're greeted by a group of large colorful tiles, each of which is a separate app. (To show how Microsoft has relegated the Desktop to the sidelines, the Desktop is merely one app among many on the Start screen. It's also the only app that isn't written for Metro.)
Metro apps are "live" -- that is, they can grab information from elsewhere, such as from social networking services or other Internet locations, and use it and display it right in the tile itself. So the weather app, for example, displays the current weather, a stock app displays current stock prices, a calendar displays current meetings, and a social networking app (called People) can display the latest updates from social networking services. In this way, you don't have to open many of the apps to reap their benefits; all you need to do is glance at them onscreen. You can, of course, click on any app to launch it in order to get more information and interact with it.
Metro is very clearly designed for tablets , because the tiles are all quite large, even those that don't display changing information. There are so many tiles that they scroll off to the right of the screen. On a tablet, you use the swipe gesture to see them. On a traditional computer, you need to scroll to the right, which is a lot more awkward. Although the Metro start screen is aesthetically pleasing, I found myself longing for the Desktop's more efficient use of real estate, where I could to see all my apps on a single screen.
That being said, the Start screen is easy to customize, so you can make sure that all of the apps you use regularly are immediately visible. And you can remove apps pinned to the Start screen by right-clicking (or, on the keyboard, Ctrl-right clicking); a menu appears at the bottom of the screen that lets you unpin, resize or uninstall the app. Not all apps can be resized, though -- Microsoft's cloud -based SkyDrive storage service can't, for example.
A menu appears at the bottom of the screen that lets you unpin, resize or uninstall the app.Click to view larger image