I describe what I think the public-school classroom will look like in 20 years, with a large, fantastic computer screen at the front, streaming one of the nation’s most engaging, informative lessons available on a particular topic. ...And I stopped. This guy doesn't get it.
You could have the most engaging, informative lesson on the face of the planet, and kids may still not listen to it. Maybe they didn't get much sleep last night. Perhaps they ate at McDonalds for breakfast and have a sugar rush. Sometimes they feel depressed, because they just broke up with their significant other. Maybe the topic is about mathematics, a subject that's just difficult to understand. There's a possibility the student is dyslexic. And this is not even the tip of the iceberg.
Generally, humans need inspiration, and they are best inspired by other humans, education no exception. There is a small subset of students who possess enough initiative and tenacity that, even at a young age, they find success by their own merits. But the majority of students face challenges that interfere with their motivation to learn. They need to be coached through these challenges, actions requiring insight into the human psyche, something computers have yet to achieve.
To draw a parallel, do we yet see any high school sports teams being coached by a computer? Shouldn't a computer be better equipped to analyze plays, to determine strengths and weaknesses of players, and to determine strategies that have the greatest probability of success? What does the coach have that the computer doesn't?