Proof of stake is the fusion power of crypto. It's been 6-24 months away since what, 2016? I toured Consensys a few years back and at the time it seemed PoS was right around the corner.

OTOH, it could be cracked tomorrow and value of dedicated silicon will go off a cliff. So I don't blame the GPGPU crowd for that, before even considering the engineering challenges of silicon/FPGA for eth.