Not only the window of opportunity is closing, the window of computing is closing, too, the Semiconductor Industry Association says:
"By 2040, computers will need more electricity than the world can generate"
What we need is twofold:
- New power-saving technologies. Any suggestions ? :-D
- New nuclear. Nuclear power is the only clean power technologie that can scale up fast enough (or at all) to serve the world's fast-growing energy needs, which is not only needed for computing.