In 1968, the USA used helicopters in lieu of light trucks all over Vietnam, thousands upon thousands. Getting an heli ride was a mundane experience for a conscripted grunt. If anything the practice scaled down a lot since due to proliferation of MANPADs. But point is, a helicopter was not something mind blowing or novel on the scale of a flying car.
Nor would an RC model shatter anyone's imagination then, another common thing. If anything, a non-controlled, autonomous or semi autonomous drones that are appearing now would be far more impressive.
Sure, the military had lots of helicopters. Also, portable radios, intercontinental aircraft, and space rockets.
These were not a relatively affordable part of daily life, though. Now if I'm in a crunch, and the roads / subways get clogged down for some reason (not a rare event), I can theoretically quickly get from my office to JFK airport on a helicopter for $100 (more like $30 from 1968), if I share the flight with 3 other people. Also, for the same money I can get a half-decent RC quadcopter with a homing ability and a camera that spies from 1968 would kill for.
No flying cars, though. Blame air safety regulations.
I don't think it was the case in 1968 yet.
Also, small personal radio-controlled helicopters with cameras, often seen in SF from 1960-70s, are a thing for many years now, known as "drones".