Not to be confused with Edge's Workspaces.
"Here's how it works. To get started, you open up all the apps you want to use at the same time for a specific Workspace. Then, arrange them as you'd like - this includes putting them in halves or corners of monitor space. Once you're done, tell Workspace to take a snapshot of which apps are open and their arrangement."
- Simon Batt, XDA
The snapshot can be activated anytime you wish...and you'll also be able to make as many Workspaces as you wish. Sounds really good to me. No date yet, but probably pretty soon.
Check it out at the link above.
Have a great weekend!