While access to resources is not evenly distributed (not everybody can consume equally), life itself is a consumption mechanism by design. We're currently only consuming 1 / 10,000th of the energy that reaches Earth from the Sun every day.
I'd be hesitant to paint a future whereby consumptive expansion isn't feasible or possible. In this past decade alone we turned automated prime factorization into a currency just to have an excuse to waste energy.
From my perspective the growth potential globally is massive, the majority of people on earth live on less than $2.50 a day. This can't be where we stop the wheels of progress.
I'd be hesitant to paint a future whereby consumptive expansion isn't feasible or possible. In this past decade alone we turned automated prime factorization into a currency just to have an excuse to waste energy.
[0] https://en.wikipedia.org/wiki/Kardashev_scale