This is what Justo from PoWH claimed after releasing his last game:

"For those of you not aware of what's happening, you're watching the death of proof of work. Byzantine fault tolerance is a concept that assumes a portion of all miners on the network will do their best to attack the network for profit. In general this is hoped to be quite low, in practice we put a bounty on exploiting it so the only transactions getting through are through non colluding miners. High gwei gas prices will still get you through (its designed to be just out of reach for this attack), they're throwing away a massive amount of ethereum to try this kind of exploit. But if they are successful, it'll spell an absolute death sentence for trust in the network. Fun. (Note, the below screenshot seems to be inaccurate now, the website used while etherscan was down was very unreliable still you were watching 1000 gwei transactions not go through for 2-3 minutes. Very interesting.)"

This is interesting.
If SHTF, it could mean an anticipated end of PoW for Ethereum.
Popcorns..