As a father with a daughter studying to be an English teacher this concerns me a lot. There are really two arguments here that are intertwined. One is what is the best way to teach children, the other is what is the best way for teachers to keep their jobs. The expectation is that you get the later by achieving the former. The linkage between these is the argument, but unless it is made specific I don't think this discussion can progress. Right now it is not specific. I want the best way to teach my kids. The teachers job is his/her own problem.
TOA didn't make clear what the author thought, just that he was very worried about his job. I think he shouldn't have been so concerned. The great online colleges are failing faster and faster. The University of Phoenix just reported that it has lost half of its students.They also report that students learn less and remember less. I've tried a number of these going back to a programming school offered by Metrowerks when they still made Mac Programming environments. They never worked for me.
Another issue not discussed is what about disabilities? Any variation from the norm may be disastrous.
Still I think he is right in one way, it will allow for pressure to reduce the pay of teacher and reduce their numbers. We have to remember profit is the difference between the cost and the sale price. If schools with big screen cost half has much, many will call for them even if they only do two thirds as well. And, this won't effect the well off anyway.