Is this another fork for ethereum? Ethereum classic is one of the well known ethereum fork so I don't think this is necessary to have another fork eth.
https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1011.md
https://github.com/ethereum/EIPs/issues/1027
That's only improvement to the ethereum network and it's not to generate another useless fork just like ETC. Casper is focusing to prevent the inflation fo ethereum through created hardcap supply to the ethereum token. Casper will change POW system to the POS and that makes every holder that meets with requirement to staking their ether to the network.
I don't know that it's the Ethereum Casper. Holding ETH will be beneficial when this was already done.