Algo for FPGA. This will hurt gpu mining even more by moving gpu miners off that coin onto something else.
But it takes time to make bitstreams to FPGA or to create Asics, they are doing this to prevent 51% atacks, they will need the community to achieve this, not only big miners
Throughput comparison graphic in the article shows a xilinx FPGA running various algos including keccak256. It'll be a matter of month if not less before the network is controlled by FPGA. Given that its a large enough coin, bitstreams will be developed while its on the testnet. ASICs will follow within a year. This change does nothing for gpu miners. Just another fpga/asic mined shitcoin.
As rdluffy said, the aim is to mitigate 51% attacks, which completely makes sense. ETC is totally at risk on current algo given it's value and nethash vs ETH, and progpow or not that's not gonna change. Moving to a proven algo does fix it.
Sure, asics might follow much later, but there's a deal of difference in needing to maliciously engineer asics to conduct an attack vs popping onto Nicehash for a minute.