household robots you've already got them too, if you open your eyes a bit. You can get robot vacuums, most espresso machines today are robots, pools are cleaned by robots, lawns mowed, etc.

We are getting to the planets faster now than ever – mainly because for 40 years the dead hand stifled us in that regard (and still does, just less!). As for hunger, we long ago put the means in our hands – have you heard a the one about golden rice in India?

As for electricity so cheap it wouldn't need to be metered, I don't think you were talking to a techno-optimist – I think you were talking to a 'socialist-loony'

The rest is beyond, fortunately, technology. Humans will be humans, as a better-humoured HAL might have said!