Shortly after Microsoft wrapped its epic Windows 10 keynote today, we had a chance to see the latest version of the next-gen OS running on some honest-to-goodness hardware. Using a Dell Venue Pro 11 tablet on display here at Microsoft's Redmond headquarters, we got to experience the software in a slightly more final form than when we last saw it. New features include a button for bringing the Start Screen to full-screen, a notification center, revamped Photos and Settings apps and, most importantly, Cortana voice search built right into the desktop. In addition, we got a closer look at the so-called Continuum feature that allows the UI to change depending on what device you're using (laptop, tablet, et cetera).

http://www.engadget.com/2015/01/21/windows-10-hands-on/