This cannot be true forever. Transistors are still shrinking yet we're fast approaching physical limits. Hence the ever larger and hotter and more power hungry

This cannot be true forever. Transistors are still shrinking yet we're fast approaching physical limits. Hence the ever larger and hotter and more power hungry GPUs and CPUs. There's also the waste involved in continuously producing those more efficient models. Their lifetime emissions, including manufacturing, may actually be worse compared to certain older generations.