Nice article, but way over-simplistic
There are so many problems that I don't know where to begin. Here are a few:
1) Not everyone wants to sit around and have leisure when they can sit around and control other people. You assume everyone has the same motivations, desires, aspirations, and goals. (only your robots are identical - humans aren't).
2) Even if you achieve this "utopia", I predict the suicide rate will increase, as will early deaths through natural causes. Remove the will to live (which is forced upon us currently) and there is no reason to live. Again, some individuals will just give up, while others will find it inspires them. I predict most people are in the former group.
3) Who is going to design better "things" we will consume? The robots? You either end up with stagnation or you end up with robots ruling the world and having no use for their former masters.
4) Research will be needed on human diseases - both current and future ones. Who will do this? Your robots won't be much good in drugs companies doing this research unless they have AI... but why would they bother if they have AI and don't need us?
5) Related to 4: antibiotics will fail before we reach your Utopian dream, I'm afraid.
6) Without oil the world won't run (think of all the plastics needed for your shiny new "things", for a start). It's debatable when it will run out, but it's a given that it will.
7) For your Utopia to work it would require a world government and for this event to happen everywhere to everyone at the same instant. It won't. Wars will be fought on the back of it.
8) Crime, hackers, and "getting one over" on your neighbour will still happen. It's human nature. See point (1). Who will police this? What will happen to the justice system when careers don't matter any more because we're all too lazy to care?
I'll stop now. You get my point (even if you don't agree with some points): it's horrendously complicated and I doubt very very much there will ever be the Utopia that this article describes. It's human nature to always shoot ourselves in the foot and never remember lessons until the mistakes have been made countless times. Robots won't alter that.