It's real. I've installed some ///M perf carbon stuff (wheel trim, center console, etc) and you can see that when it's not mounted.
As for weight savings? not really. Think about it. IF they really wanted to save weight, these parts wouldn't exist at all....they're not necessary for the functioning of the car (and yeah, can say that about a lot of things). Now assuming the expectation in a road car is that they look nice and have things like trim, CF is lighter.
Oh, and on the wet v. dry carbon fiber.....dry is better\lighter\more $. I think it's cool that this is the way BMW went with our cars.
Good article on dry v. wet.
https://www.drbeasleys.com/blog/2014...-carbon-fiber/
Updated article that has better explanation of the manufacturing process:
https://www.drbeasleys.com/blog/2018...ber-revisited/