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The perpetual SHA256 hashing machine...

Did anybody tell 21 that pure proof-of-work hashing was just an experiment and could go the way of the dinosaur?

Ethereum, Nxt and other cryptocurrencies are already using proof-of-stake or some other hybrid process...

Ethereum isn't using proof-of-stake quite yet, that's planned for a later version in a year or so. They're starting out with a proof-of-work algorithm that's designed to be ASIC-resistant. (It's heavy on memory bandwidth, which is already optimized in GPUs.)

Not that this makes any difference to your point, of course.

Are you sure?

Yes. Here's the forum on ethereum mining: https://forum.ethereum.org/categories/mining

And a blog entry from half a year ago that describes their plans: https://blog.ethereum.org/2014/12/17/ethereum-dξv/

dagger hashimoto

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