With the hindsight they now have they probably also want to stop the treadmill as soon as it starts tilting. That requires a new sensor, but seems like a good case to catch.
By the way, thanks for mentioning that the child wasn't injured. If I thought I was watching a child being hurt or killed, I don't think I could have watched it, but knowing beforehand that the children were not injured, I found it kind of hilarious.
Also, for all I know, it's possible that those threadmills have some safety properties which the Peloton threadmills don't. Is the belt less grippy, so that it would be easier to get out? Do the motors stop spinning when they get stuck? I don't know, but it doesn't seem too unlikely. I'd be interested to know.