Well according to what I observe Harris is introducing spiritual ideas to secularists such as meditation. This is not new but what is new is the attempting of a 21st century rational scientific justification for it. Harris has a background in Buddhism so naturally he will extract the useful tenets of that doctrine.
What Harris has missed which others have previously picked up on (such as Lavey and early socialist ideas such as "God-Building") is the human desire for ritual. Lavey recognized that at the core of religion sits ritual. It doesn't matter who you are, human beings love rituals. I suspect it gives surety, definiteness and a sense of order. From initiation/acceptance rituals such as a Jewish bris, to African marriage dancing feasts etc.
Then there is also superstition which is where the human sub-conscience overrules the most rational human behaviour.
Deep reverence is an idea which was popularized by Carl Sagan. which he argued was not only the purview of religion but also science.
Then there's also religious prophesy which secularism is for the first time attempting: The technological singularity
Sooner or later these ideas are going to be amalgamated into new secular religious philosophies.
This is a logical next step.
And yes, music did reach it's peak in 1979!
What? Disco, Punk and/or Glam Rock?
Oh come now, don't be a grandpa... Listen to some NIN, Depeche mode, Wolf mother, Radiohead or even Knife Party.