I think there is a big difference between the reactions in these two generations. Whether it's their ability to connect with some so virtual on an emotional level, or their physical ability to interact with the game. The reactions are not one in the same.
The elders expected things to happen without interaction, simply stood there waiting for something to happen and in the end die, while the teens tested and explored.
I think the fact that this is such an alternative source of entertainment for the elders is the reason that they have trouble giving the same type of reaction.
Maybe I'm reading into it too much, what do you think?