I really don't know how the audience are going to watch the match, because those who in United States of America cannot travel to and fro to watch the matches among the three countries. And since USA has the highest number of matches in the tournament, the final three matches will be played in USA. Since there are three countries that are hosting the great tournament this this team, the tournament will be more interested because each country will want to make more interesting than the other.
Well, this is exactly what my concern was and i stated it few pages back, but another user( cant recall the name right now) replied and said that the world cup tournaments have become bigger than every single country in the world, and as that, it is no longer a tournament that should be hosted by one country alone, he finds nothing wrong in FIFA deciding to host the 2026 world cup in three different countries.
Personally, like ive said before, tourists, that is those who will be traveling to view the match played live would be the ones at a loss, as they wont be able to watch all the games, international journalists/news outlets are gonna have to spend much more too, as they will have to hire more hands, fly each of them to one of this countries each so they can be able to cover all the happenings in this three countries, if they dont do it this way, logistics might end up being a big problem for them.
This is my thought though.