Here is the list of shortcuts which you could try in Windows 10 Technical Preview.
- Snap window to the top of the screen: Windows Key + Up
- Snap window to the bottom of the screen: Windows Key + Down
- Snap window to the left side of the screen: Windows Key + Left
- Snap window to the right side of the screen: Windows Key + Right
- Task view (opens the new Task View interface): Windows Key + TAB
- Switch to recent window: ALT + TAB (unchanged) – Hold shows new Task view window view, let go and switches to app.
- Create a new virtual desktop and switch to it: Windows Key + Ctrl + D
- Close the current virtual desktop: Windows Key + Ctrl + F4
- Switch to the virtual desktop on the left or right: Windows Key + Ctrl + Left / Right