But I don't (seem to) have that need for sensory saturation with other activities. I have no problem just sitting down to read for hours.
Could you elaborate?
When watching something on television with family or friends, if a question ever comes up about how something works (what it does, or what it is) that may not be made clear by the show, looking it up on another screen (e.g. mobile device) can lead to a much deeper conversation and better enjoyment of the subject matter. It can also lead to conversations afterwards discussing what we watched in greater detail than if we knew only what was presented in the show.
As an example that happened to me over the holidays, I was watching Alaska Aircrash Investigations with my parents as my mother has a fascination with investigative things, and she spent part of the time on her tablet looking up information on the NTSB staff in the show and, occasionally, some of the accident reports (if she could find them). This lead to both an interesting series of conversations about the people involved and greater appreciation for the program since we collectively knew more about the investigators and their backgrounds.
Tangentially, this is also why I think streaming YouTube to a television is such a beautiful thing (sometimes having the comments on a second screen while watching can be hilarious or depressing).