I saw a youtube video of it.. From what I could see, all that happens is that the tub rotates slowly and water just pours out of an opening, like rain.
.. Skip to 3:36
Supposedly, it's a way to save water on the rinses, but that can be defeated somewhat by using the fabric softener option.
Personally, I'm not a big fan of these kind of machines. Seeing the washplate grate up against the clothing without any water almost makes me sick.
It's a bit of a different concept than the Roper/Estate machines because at least this way, the clothing actually may get wet, as opposed to just that extremely low water level with a conventional agitator.
I would like to see a video of one of these washers with a full load of something hefty like jeans or just with lots of clothing loaded up to the top.