Yes, I've watched Albert Bartlett's lecture several times; and if we get to talking about converting literally everything to pure computronium in a sphere expanding in all directions at approximately light speed, I admit that's a lot further into "forever" than I was imagining.

I was more thinking of the near-term future of resource scarcity, to make the point that "value" doesn't run out just because gold or oil extraction from the Earth runs out; people value intangible things and the economy runs on that being real value.