The always wonderful and thought-provoking Venkatesh Rao has a typically spot-on analysis of the ideology underlying the idea that we are heading for a world of either collapse or abundance. Along the way, he drops all kinds of great thoughts, like the Generalized Godwin's Law: "Every discussion within an online community converges to a zero-information signal characterized by empty assertions concerning the foundational dichotomy of that community."
A resource gets cheap enough to waste when it is cheap enough that you can leave it out of the strategic cost calculations for most products and services that it is a part of.
This is a relative definition of cheap. Global shipping is an example of a wasteable resource today, for value-added manufactured goods. Relative to manufacturing and other costs, the costs of shipping something from China to the US (say) are so trivial that as a first approximation, you can ignore them. You can think about business models and strategic positioning issues without thinking about transport (your accountants still have to include it in their book-keeping of course). The design space for your business model shrinks in useful ways.
Not all resources are wasteable in all industries. Electricity is something you can waste in many contexts in the developed world, but not in the data center business, where it is a big enough cost component that it pays to locate data centers near cheap power.
This suggests a good measure for development actually. A nation or region is as developed as the resources its economy views as wasteable (in the good+strategic sense).