This is indeed the future of education. It is something the governments should do now in countries with substandard educators. A few superstar rockstar teachers can replace millions of average teachers. The offline physical teacher will be there to merely solve doubts(and ensure kids are actually watching stuff) while the online teacher streams live to millions of students. The biggest challenge will be to make the experience so immersive that kids can learn online. VR might be able to help in this regard.