I'm not surprised you can edit the length of a clip and replay it in the camera. My CG65 can do this by itself, so I'm sure the HD1000 can.
What concerns us is replaying movies made from clips from the cameras. That means splicing together multiple clips, maybe some stills, adding titles and background music, transitions. And that's just a start. Then being able to replay the finished product in the camera.
Again, I've only succeeded in doing this with the Samsung i6. Samsung keeps putting out new versions of the i-series and the NV-series. I must say I'm pulled toward replacing the i6 with a newer model. I've never had a camera I've been as happy with as the i6, and used it as my main camera for almost 3 years.