Listening to the safety briefing is not of much use if one is hearing-impaired, which suggests that there must be an alternative means of preparing oneself for flight emergencies--and there is: the safety card. It is reviewable at one's leisure, and I have yet to see one that contains advertisements or other obnoxiousness.

I wouldn't object to more focus on pax in the exit row demonstrating that they have a clue about how to open the exit door, though, which might mean exit row pax should put aside the headphones, the e-reader, etc. for a minute (though not necessarily stowing them).