for the cyberpunk types.
Or for sci-horror...this *screams* unintended consequences.
Actually, the unintended consequence it screams the loudest to me is: If we only need four hours sleep, then instead of employers expecting 16-18 hour days out of people, they'll start expecting 20-22. We live in a sleep deprived society and while this at first glance looks like a possible 'cure', I think it might only make the problems worse.
And what if there are people it does not work for? Will they be left on the scrap heap of the rat race? Maybe it's time to look towards social and technological developments that, instead, redefine success itself.