A whole new take on remote production, eh?
The kind of screens used for backdrops on The Mandalorian have been in use for years to get lighting and reflection to match a virtual scene (I first remember hearing of them being used for Gravity, I'm not sure if it goes back further), Mando's big innovation was one of scale; movies that filmed earlier this year were running into trouble finding that kind of screen for their own visual effects sequences because the show had bought up most of the world's supply. While it's entirely possible that Mandalorian-style tech could, in years to come, lead to actors having home film sets the same way they have home recording booths for voice-over work, we're probably not there, yet (come to think of it, what we're thinking about is basically what Guy Montag's wife aspired to have in Fahrenheit 451; a room where all four walls are entirely screens).
For one thing, it's not just the costume, there's also a matter of lighting, camera operation, and make-up/hair. I can see a world where all these problems are solved, but I don't think it's one we'll get to at the drop of a hat, while enforcing social distancing. But, like I said, in five or ten years, it could be commonplace for actors who are unwilling or unable to travel for cameos, or to film quick pick-up scenes or shots after principal production.
Enjoy! 
