I think it's fair to say TV and radio did bring "Shakespeare and the classics" to the general populace, as well as a great deal more that was previously inconceivable. "Weird reality TV" is quite a small genre compared to the set of all audiovisual media.
More broadly, you seem to be saying that TV and radio have had a net negative effect on culture - that's a pretty big claim, though there are inarguably negative effects.
I don't think life extension would be fundamentally different from any other "life-improving" technology in that regard - some would have it and some wouldn't, and it would lead to both great things and dysfunctional effects. Impossible to predict the full impact ahead of time.
I don't think "immortality" is on the cards anyway, just living longer. Note that rich people already live longer anyway.