Isaac Asimov wasn't precisely right; but he wasn't exactly wrong either.
Robots -- even humanoid ones -- are no longer just science fiction.
Consider this report from Scientific American:
At the 2005 World Exposition in Japan's Aichi prefecture, robots from laboratories throughout the country were on display. The humanoids came in all shapes and sizes: they moved on wheels, walked on two legs, looked like lovable little dolls or fantastic mechanical warriors. All, however, were instantly recognizable as artificial creations. Except one: it had moist lips, glossy hair and vivid eyes that blinked slowly. Seated on a stool with hands folded primly on its lap, it wore a bright pink blazer and gray slacks.
For a mesmerizing few seconds from several meters away, Repliee Q1expo was virtually indistinguishable from an ordinary woman in her 30's. In fact, it was a copy of one.
To many people, Repliee is more than a humanoid robot--it is an honest-to-goodness android, so lifelike that it seems like a real person.
Japan boasts the most advanced humanoid robots in the world, represented by Honda's Asimo and other bipedal machines. They are expected to eventually pitch in as the workforce shrinks amid the dwindling and aging population. . .
But robots don't have to be humanoid to be useful.
Even further down the spectrum from humanoid is the prospect of micro-robots that perform work in swarming teams.
That idea, in turn, leads to nanobots -- robots so small that they are built with nanoscale parts and can accomplish tasks impossible for larger machines. Is this just science fiction? For now, yes. But it wasn't too many years ago that Asimo, Roomba, and Repliee were just visions, and not reality.