And yes, Cortana is coming to the PC.
After Microsoft operating system chief Terry Myserson announced that Windows 10 will be a free upgrade for current Windows 7 and 8 users, Microsoft's Joe Belfiore took the stage to run through some features coming to Windows 10 Preview Builds designed to make actually using the operating system smoother.
First, Belfiore showed off some helpful tweaks to Windows 10 features that have already been announced: The Start menu will be able to expand to fill the full screen if you desire, for one thing. The Action Center (read: Windows 10's notification center) is receiving improved functionality, such as Windows Phone 8.1-esque quick action buttons that let you activate features (such as Bluetooth and Wi-Fi) with a single click. Notifications in the Action Center will be able to be expanded.
More helpfully for everyday workflow, Windows 10 will condense the Control Panel and the modern UI PC Settings into a single interface, eliminating Windows 8's maddening insistence on dumping crucial system tools into two separate locations.
Developing...