Microsoft to add virtual touchpad to Windows 10
 

You can now drive content on a second display from your tablet without ever having to attach a mouse. The virtual touchpad lets you do more with a tablet and a second screen - just connect to another monitor, PC, or TV, go to Action Center and tap on the "Project" Quick Action to extend your screen. Use it just like you would a physical touchpad to control content on the connected screen. To enable it, press and hold on the taskbar and select "Show touchpad button". A touchpad icon will now appear in the notification area (just like Windows Ink Workspace does), and tapping on it will bring it up the virtual touchpad. Fun little feature.

http://osnews.com/story/29481/Micros..._to_Windows_10