Tom selleck is quite solid in the lead and this is another clear career choice that stopped he's career from taking off. The support cast is just poor, this is solely the fault of the director who makes to many errors.
In typical eighties fashion it had bad ideas and an over the top ideas that are laughable.
Runaway is set in what by now might be an alternate present. In this universe, robots are cheaper than minimum wage workers, so people embrace them for all sorts of functions, in all sorts of environments. There are construction robots, household robots and security guard robots. Unfortunately, like real machines, they rarely function exactly as people want them to. Mostly this means they clumsily break down and start running around or throwing stuff off of buildings. And for those situations, we have Magnum P.I., supervised by captain Harris from Police Academy.
But then the evil Gene Simmons from Kiss comes into play, and makes technology his bitch, turning all technology into his eyes, ears, and weapons. Yes, the same clumsy, realistic robots. Okay, granted, writer and director Michael Crichton doesn't capture exactly the same amount of awe and suspense here that still has people debating how much better his book Jurassic Park was compared to the film, but overall it's fun to watch. The movie has the feel of a cult classic all over it, predictable plotlines, cop show clichés, the works, and in the end it's rather enjoyable, and hasn't aged too badly. But for me the main appeal of the movie is probably still the robots. I can't help but think that if not mobile phones but robots had become the great technology craze of our time, yes, they would have looked and worked like that (except smaller, nicer polished and with more Apple logos). It's amusing to watch for any science fiction fan.