The electronic thing is accurate enough for the sake of general argument, but the backbeat thing, well, dude, c'mon - "Moanin'" had a heavier backbeat than anything fusion ever produced.
Now, if you want progenitors of today's smooth jazz, you can go back to the Mizell Brothers productions for Blue Note in the early 70s, The Kudu label (CTI'S "commercial" wing, although as the decade progressed, CTI itself turned more "pop"-ish), and the work certain Atlantic artists (Les McCann in particular) in the early 70s. The stuff all started out innocently enough, but as it became institionalized, it became formulaic (or the other way around...), and soon enough became a product to be regulated, measured, and mass-produced, just like canned soup and paper clips. Reliable, but lifeless, offered to the market place instead of for the people.
From "populist" to "popular" is too often a small but fatal leap from lively gregariousness to terminal whoredom, I think.