Trump and his childish base just like the sound of "Space Force." Really, the Air Force already covers this stuff. It's nothing really new, they're just giving a different name to it, creating a "branch" that's not really necessary. Which is fine if they want to do it, I don't see it as a huge deal one way or the other, I just think it's goofy.
If they really want a new separate specialized branch of the military, it ought to be a cyber-space-force. Which I know is covered under other departments already, but that's really the main threat we're facing. Russians have already hacked into our power grid, and if they wanna shut that down it's gonna result in a hell of a lot of chaos and death. People are so dependent on modern conveniences that thousands will drop dead in weeks from bad water alone. Cyber warfare's going to end up being one of the main battlefronts from now on... and, right now, Trump's not even really addressing it because Putin "says nice things" about him, and Trump cannot confront anyone who does that. Also, he's too vain to acknowledge meddling because he doesn't want to admit it contributed to his "win."
The "Space Force" is mostly just a silly distraction. It's not going to mean much unless there's money put into it and what it does gets defined more precisely.