First off, the hippies still happen. They were basically the 60s version of the beatniks of the 50s and they weren't just a U.S. phenomenon. There's no reason to think JFK living would have any major effect on the hippies as they weren't a response to the Vietnam War, tho of course they were affected by it.
Second, I don't see Kennedy ending all involvement in Vietnam, tho he likely wouldn't have made the major commitment that LBJ did.
Third, without LBJ as president, there is no CRA in 1964, tho maybe in JFK's second term. The Great Society programs such as Medicare either don't happen or happen in a reduced form.
This. I also think a Republican still gets elected in 1968. Whether that Republican is still Nixon or not is debatable, but a Republican still wins 68 none the less.
