I don't see it as necessarily dumbing something down. If you wanted to teach someone how to play tennis, it'd only be natural to have them watch a few games to get some idea of the game before trying it themselves. This simply seems to be taking that concept to a finer level.

Indeed, it seems like this could lead to more complex games, since seeing something modeled a few times would allow you to go beyond stuff that just has to be guessed or learned via instructions or tutorials. This system might let you learn a really complex game in a hurry rather than having to start off with long tutorials or lots of up-front reading.