not the OP but I don't think the conclusion that many others have to stay poor if we go down the route of a dematerialised economy is true.

If anything I'd argue the steps towards prosperity in an ecologically sustainable way in this scenario are shorter for developing countries, it will protect their ecology (it is the third world who works in the strip mines for the batteries for affluent tesla drivers in California), accelerating digitization is cheaper than traditional infrastructure, it gives them the opportunity to leapfrog over traditional industries, it will drastically reduce the impact of climate change and so on.