For completeness, you need a .smil file for ABR with VOD streams. For live streams coming through an encoder that can generate multi-bit-rate renditions you also need a .smil file.
Then you would call the .smil file("stream.smil" for example) as the stream name. (instead of "myStream" for live, or "sample.mp4" for VOD):
When running the live stream through the Wowza Transcoder and generating a NGRP you do not need to create a .smil file.
To answer your question, your playback URL should work assuming everything is setup correctly.