This seems interesting but it’s difficult to answer the questions. I prefer description for all film experiences, at home and in the cinema both, but I am not interested in any other sense being part of that experience. Disney World had a little film like this where they released smells at certain times and the seats moved and I found it very unpleasant. It was too much stimulus and nothing useful for me (there was no audio description so smells and motion came out of nowhere).
I would be interested if AI is capable of giving any kind of audio description that makes sense. Currently I haven’t heard of anything that can describe a picture accurately, let alone a film.

I’d personally not buy this. The idea of smelling or tasting in a movie is strange to me but I wanted to let you know Audio Description already exists so there would be no need for your device that tells the user what’s going on.