This is the Separett toilet. Ann and Dave have one of these in their house. The idea is that solid and liquid wastes are separated and handled differently.
Liquid waste (also called 'tinkle') is taken away through a French drain into the earth, away from the house. You have to sit down to make the separating part work. No problem for the ladies, and perhaps just a little re-education for the guys.
Solid waste is collected below, essentially into a bucket. Now it's a nice bucket, lined with a biodegradable plastic bag, and it turns a little bit every time someone sits on it so the solid waste (also called "poop") is spread evenly, but it's still a bucket. A bucket filled with poop.
I have poop bags to pick up after Ollie on a walk but I don't necessarily want to do it after myself. Plus the new rules mean the bucket has to be sealed (they provide multiple buckets) for 6 months before composting. So I have to store sealed buckets of poop somewhere. Call me squeamish but I'm not sure about that. Also it has a fan system to ventilate the contents of the bucket. Because it doesn't mix with liquid waste ("tinkle") it is supposed to have less odor, and we didn't really notice any smell at all from Ann and Dave's, but it still seems a bit low-tech for me...