90% of the hashing power has signaled their intention to adopt segwit2x as of late June. I assume it will become the dominant chain once it locks in right before August 1st.
That's assuming hashing power will determine the outcome.
In the exchanges runs will take place. The actual economic users will vote this issue out.
In the end spreadsheets will be updated, and miners won't want to spend their electricity on a chain that went unprofitable.
Miners may have the software coming from segwit2x, and be the ones who actually provide the technical consensus. But the economic consensus will trump everything else; and late software along with questionable roadmap does not inspire confidence.
Hashing power is what mines the blocks. There will be no "voting the issue out" if the dominant chain is using Segwit. Just because you buy a few BTC on GDAX or something doesn't somehow give you more say than the miners over what software gets run on their own machines. Vast amounts of hashing power is concentrated in the mining pools that are signaling support for this and 99% of the people speculating on these currencies don't care about the underlying protocol, they just want to make money.
That's misunderstanding even the basic issue here. Segwit signaling needs to begin August 1st, it won't lock in for about 2 weeks and that has nothing to do with the 2x part which won't even happen until November.
Incorrect. NYA begins locking in Segwit as early as July 21st. The point is to get Segwit locked in before August 1st so the UASF has no chance of creating a second chain that has any chance at life. You are correct that the 2x portion will require a hardfork that will presumably come down the road.