Tonight in San Francisco Microsoft unveiled its next Windows operating system, Windows 10, and gave a first look at an early technical preview for the PC. The announcement highlighted advancements designed for business, including an updated user experience and enhanced security and management capabilities. We’ve merged all the main improvement you have to know about.
1
It’s united system for smartphones, laptops, desktops, TV, gaming and more. 
2
Start menus back. It provide quick one-click access to the functions and files that people use most, and it includes a new space to personalize with favorite apps, programs, people and websites.
3
Multiple desktops on a one screen. Instead of too many apps and files overlapping on a single desktop, it’s easy to create and switch between distinct desktops for different purposes and projects — whether for work or personal use.
4
CONTINUUM merges touch and non-touch interfaces together. Great for tablets!
5
It’s nice! Microsoft killed so uncomfortable Metro-iconical design and now OS looks like OS. And it’s more secured! 
6
Snap enhancements. A new quadrant layout allows up to four apps to be snapped on the same screen. Windows will also show other apps and programs running for additional snapping, and it will even make smart suggestions on filling available screen space with other open apps.
7
New Task view button. The new Task view button on the task bar enables one view for all open apps and files, allowing for quick switching and one-touch access to any desktop created
8
Apps from the Windows Store now open in the same format that desktop programs do. They can be resized and moved around, and have title bars at the top allowing users to maximize, minimize and close with a click.
9
IT-experts can download the pre-edition from 1st october 2014.
10
It’s free for Windows 8 users (hopefully).
boyman 