As far as I know, it's a non-contentious hard fork, which means a consensus of the new chain.
Oh yes, if it is not a matter of hard fork, I think most users or miners will not care about it. The price will be stable, If it is going to be hardfork like eth to etc that will create new eth, there will be big problem. It is going to be a real test for eth platform, if it is succesful , the price will jump if not the price will be down.