I would not wish this on anyone. I had to have dual displays and the primary display is mirrored and the second display is usable. Too finicky or downright grumpy for everyday use.
The answer looks like no for most of us.
Can you open a separate window and surf the internet while mirroring from a laptop to a smart TV?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic