Nobody can really stop the development of ASICs,
what sort of fork would be required to make the proposed ASICs useless ? how radical would the change have to be ?
I am thinking about purchasing an ASIC but the idea that it could be easily rendered useless makes me unsure
It would mean an algo change for PoW. Not so trivial, but not the most daunting change.
Despite the drawbacks to Asic mining, it's pretty clear the pros outweigh the cons. Most sensible people come to the same decision. I'd would be VERY surprised if stakeholders were to vote to fork the PoW algo.