PowerShell's "pipeline" is largely analogous to chained methods in a scripting language's REPL, and therefore is not the same as Unix pipes, which are used to share data streams between processes.

Unix already has the object functionality you see in PowerShell: Python, Ruby, the JVM, etc, and all of these have existed for far longer than PowerShell. The only thing PowerShell has is a bunch of shortcuts for system operations, which Unix already has in the form of POSIX shells and utilities, and which many languages provide language-native abstractions for.