I doubt Microsoft will ever remove the terminal prompt (either cmd.exe or powershell), as too much of the core system still is dependent on it to function. There are still parts of Windows that you have to use the terminal to even run those commands. I doubt there is too many (if any) system administrators that would want the terminal to be removed. In the end, some actions are easier to run a simple script/command than going through several windows to do the same thing. A prime example, I'd even over, is imagine setting up new accounts for 20 new people with the correct permissions that they need.