Windows 7 is better than Vista, How & Why?

Finally big news is out, after being secretive about the project for so long Microsoft finally gave the first public demonstration of Windows 7.
New OS takes user experience to a new level, got a new look and seemed to be much better than its predecessors Vista.
Unlike Vista (which brought a new display layer and vastly improved on security along with some badly written applications and compatibility issues for many of the software’s after running successfully on XP), which left the users frustrated, this will not happen with Windows 7.

-If an application works with Vista it also work correctly with Windows 7 and even faster
-Notebooks get better battery life in Windows 7
-Windows 7 will be more reliable than Vista SP1 from first day

So unlike the transition from XP to Vista, the transition from Vista to 7 won't show any regressions; so nothing that used to work will stop working.
This time, Microsoft have tried to learn from its users through its Customer Experience Improvement Program (CEIP) for e.g. Microsoft knows most of the users have between 5 and 15 windows open at any time although only one or two of them are actively active, with this consideration Microsoft tried to refined the user experience. Microsoft has streamlined and refined the user experience as a result unlike Vista's window memory manager which devotes the same amount of RAM to every window opened (no matter how many windows are open), it acts like every one of them is visible and full screen size, even if you had them minimized or in the background. Windows 7's window memory manager doesn't do that—only the visible windows use video resources now. That means you can actually run Windows 7 with 1GB of RAM—unlike Vista, where having anything less than 2GB is a call to trouble and this is just one of the example.

Other large improvements include –
New Taskbar: Text descriptions on the buttons are gone, in favor of big icons, which can be re-arranged at any time and mousing over an icon shows a set of window thumbnails.
All applications get thumbnails a step ahead of Vista for example IE8, for instance, has a thumbnail per tab (rather than per window).Improved Desktop: Another area that 7 improves is peeking at windows; switching to a window briefly just to read something within the window but not actually interact with the window. To make this easier, scrubbing the mouse over the taskbar thumbnails will turn every window except the one being pointed at into a glass outline; moving the mouse away will reinstate all the glass windows. As well as being used for peeking at windows, you can also peek at the desktop that means one can make windows temporarily transparent, in order to see files on the desktop.
Nowadays peeking at the desktop is particularly significant, because the desktop is now where gadgets live and sidebar occupies a big chunk of space and isn't really viable; thus Microsoft has scrapped the sidebar and placed gadgets onto the desktop itself.
New Explorer Concept called Libraries: Libraries provide a view onto arbitrary parts of the file system with organization optimized for different kinds of files. In use, Libraries don't have the complex database system underneath, but they do retain the idea of a custom view of your files that's independent of where the files are. System Tray: The system tray area now has a customize option that allows the user to suppress notifications, annoying for developers but empowering for users. It is all about making Windows quieter and less annoying.
New Applet design: Paint and WordPad have been refreshed in the style of Office 2007 and Calculator is more sophisticated.
Windows Media Player: Window Media Player supports new codecs including AAC, H.264, DivX and Xvid, and support for the Digital Living Network Alliance (DLNA) 1.5 media-streaming standard, including transcoding where necessary.

With all above new User Interface will completely change the user experience and fires a new journey of computing.

Reviewing other important aspect of Windows 7 i.e. Security
Windows Solution Center: Microsoft is replacing Windows Security Center with a new utility called Windows Solution Center. In addition to monitoring Windows Firewall, Automatic Updating, virus and spy ware protection, Internet security settings, and User Account Control, Windows Solution Center will also monitor PC maintenance, backup, troubleshooting, Network Access Protection (NAP), and more.

In addition to above there will be improved display settings, games explorer, Aero themes, Wallpapers and Home Group Networking (new sharing resource)

There is much more to explore and I have a limitation to share everything so to know more just click below and download PDF file from Microsoft.
Download PDF Win 7 users guide
Further all enthusiasts have to hold their breath till end of 2009, when it is rumored to launch.