Why worry? The Slo-Mo is very smooth.
The point is that depending how it works it could be very simple to re-create post-edit.
The slow-mo on the CX410 looks very smooth, when you actually analyse it it's clear it's simply a frame repeating algorithm (not every other frame).
If you simply shoot at 1080p50 and then time stretch in a good editor it is just as smooth and has no limit on the crude in camera effect that clearly runs out of buffer space.
Already posted how the CX410 achieves this.
If someone with the actual camera actually analysed how it works, it's more than likely any camera with 50fps capability could achieve the same effect.
Unless of course the camera really can shoot at 100fps, which seems doubtful considering the minimum shutter speed required. Depending on the available light, the max aperture of the lens and the iso/noise capability of the camera then any shutter speed slower than 1/100th of a second could not possibly capture every frame.
The fundamental is you cannot capture more frames/second than the fastest shutter speed you have for the current lighting conditions, consistent with the basic camera capability. This is the absolute speed limit, adding a high speed buffer may allow the camera video processing to keep up for a while until the buffer runs out of space.
If most any consumer camcorder can do this even in average lighting conditions, it must be cheating in some way.
So far no-one seems to want to find out how.
If someone with the camera shoots a short clip, more than willing to check how it works (not exactly rocket science) and try and reproduce.
In fact this is one area where a camera capable of 50fps can help, namely in producing smooth slowmo effects.
You cannot get over the basic physics involved.
As I already said consumer cameras have to cheat to get this sort of capability. If they do you can do the same post production without the inbuilt limitations of the camera frame buffer limits.
A video camera is simply a still camera capable of recording at high frame rates, it has the same exposure limitations as a still camera, which are second nature to any still photographer and then add the time required to compress the image (which is why a frame buffer is required). DSLR's also require a frame buffer for automatic multiple image capture, exceed the buffer then the frame capture rate drops dramatically. The difference is the amount of high speed buffer required. Compare the storage required for a 24Mp dslr compared to a 1920 x 1080 camcorder.