OK, now I understand what you are thinking about.
My first thought is that the performance of running an interpreter for Python inside the interpreted language javascript is likely to be poor. Thus, I think it would be best to concentrate efforts on packaging Jupyter and useful tools so that users can just download a package using their standard OS packaging methods. Keeping those packages up-to-date is a considerable effort. Additionally, servers on which people can just try Jupyter need to be kept available.
Jonathan