To be fair, Windows really hasn't pushed Powershell all that much. They haven't even fully ported over all of Command Prompt's commands. You have to prefix those with .\ (I think; it's been a while) in order to get them to run even though the error message that comes up if you don't include that will tell you, "Hey, there's a command named this. Prefix it with that to use it."

Now, instead of simply porting everything over, they have one app (named Terminal) running both programs.