Received my 50/1.8S today and despite darkness and no tripod I had to test it out. These images are not meant to be technically "perfect" rather I think they demonstrate the possibilities the new camera system provides.
All handheld.
EXIF:
First one is f/1.8, ISO 100, 1/50s.
Second is f/1.8, ISO 4000, 1/5s.
Third is f/1.8, ISO 8000, 1/4s.