The task viewer has now been buttressed with the possibility to create several virtual desktops where you can have different programs open on each and swap windows between them. As has always been the case, you can open the Task Viewer with Win + Tab and swap between windows with Alt + Tab, nothing new under the sun here. That said, when working with multiple desktops there are a few new things to keep in mind:
Win + Control + D: Create a new virtual desktop and open it.
Win + Control + F4: Closes your current desktop.
Win + Control + Left/Right Arrow: Switch between open desktops.
Other keyboard shortcuts
Win + I: Opens the system setup menu.
Win + E: Opens the file explorer.
Win + S: Opens Cortana for keyboard input.
Win + C: Opens Cortana for voice input.
Win + X: Opens the advanced options menu.
Win + L: Locks the computer.
Win + A: Opens the activity center.
Win + D: Minimizes all the windows.
Win + P: Opens the multi-monitor manager.
Win + R: Opens the Run menu.
Alt + F4: Closes the current window.
Alt + Space: Opens the task manager for the current window.
Win + 1, 2, 3, 4...: Open the program added to the Windows taskbar in that position.
Win + Shift + Left/Right Arrow: Moves the selected window from one monitor to another.
Win + H: Shares the selected content (if possible).