It all seems trivial if he is successful building this. I suppose it's true that applying tech to poop isn't something a lot of people are researching.
It looks like the one key feature "how to get the poop hot enough" has some fundamental unworkable problems with it. The fiber optic gets cm square hot, not a big area (say, probably the size of a large stew pot) hot.
That means, he's just got a toilet with a light in it.
Those things are going to be huge, hard to build, and need lots of materials from somewhere.
Neat idea, but won't work. Industrialized countries with problems of "how do we make a trail side toilet work" may be able to use them though.