I would like to have PM use both of my monitors. On one monitor I would show the full image and on the other the same image at 100%. That would allow me review images much more quickly and make sure I check all the critical images for sharpness
Yes, this works in Windows 10. Just drag the window you want to the second monitor. It is easier to drag a window between monitors if it is not maximised to full screen as you drag it - maximise it once it is on whichever screen you want.
You should be able to have the contact sheet in one monitor and the preview window in another.