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The quality of the stadiums and any other facilities should be obviously higher than the last world cup we saw because four years passed and we can have better technologies for stadiums and this can definitely help the hosts, while in some countries they don't have a good financial system like Qatar does, they can't provide good quality facilities if they don't already have enough facilities.
Well, 2 out of the 3 countries have already hosted the world cup in the past, Mexico and the US. So basically there's a big chance they would just be reusing their current infrastructure.
I don't think they're going to spend too much making new stadiums or renovating old ones.
Most of the time it's not about stadiums, it's about other stuff as well. Qatar didn't spent 200 billion on stadiums, not even close, that was just a few billion dollars and all the others went to many more airports (or renovation to the current ones) state of the art hospitals, with literally everything you could ever imagine and not just one, nearly a dozen, roads that would be not just regular roads, but bridges and sea tunnels and so forth as well. Basically they built the nation from ground up.
So, USA and Mexico and Canada could end up still spending billions on this. Russia had stadiums too, but spent nearly 20 billion on this, why? Because they needed to be ready for all those people coming in. You need to remember that in most of the time you do not expect tens of millions of people to come and go in a month period, that's extra and that requires getting ready.
These tournaments are also economic catalysts to some degree, but I think in terms of infrastructure Canada and the USA will be mostly fine already, although I think any event of that magnitude will require infrastructure improvements and adjustments no matter what. Even if it is only for the reason that nothing has been renewed for a long time and additionally, security standards and also quality standards might have risen over time and must now be complied with under a new set of rules and conditions.
I think having Mexico on board is really a good outcome of the whole decision because the countries that are not as rich will benefit from the cooperative effort with nations that are in a better situation. Mexico is also a great soccer nation and I think the mix has been chosen well with the three countries. It sounds tempting to go there and watch one game in each country. It would be an amazing couple of weeks, but getting tickets is probably close to impossible.