^I don't think that the US will surpass South America or Europe in soccer but I do think we can get to the point where we are competitive. For example, Brazil, Argentina, Germany, etc, will likely always be in the World's top 5-10 teams yr in/out.....I don't think we will surpass those on a regular basis but to be a top 20-25 ranked team yr in/out can and will definitely happen. We have states that are as populace as some of the countries that perennially litter the top 20-25. The notion that we can surpass these teams is not far fetched.
According to the 2010 US census, we have ~310,000,000 people in this country. Ecuador has ~16,000,000 and Peru ~30,000,000. The Latino population alone in the US account for 17%.......or ~53,000,000. It is reasonable to assume that a premier sport in general for the Latino populace is soccer. And that's leaving our people who came to the US from other parts of the World who don't fit into the above census category. So, we're already guesstimating that 25% of the US population views soccer as one of their premier sports.
Now, couple this with the fact that soccer is currently one of the most popular youth sports and is growing faster than all others combined.....
We just have to find a way to develop the talent we have. The interest is already growing exponentially.
I think in my lifetime (I'm middle aged) that soccer will be among the top 4 sports in this country. Will it suprass one or two? Don't know. My guess is that it will surpass baseball which is not trending well compared to other sports. But I think it will be up their with their numbers.