I think whether you see a booming economy or an economy that's been in the doldrums for years is all about where you live. In most of our cities, the economy is indeed booming. This is particularly true with the highly skilled economy. For example, here in the KC area there is more construction than there are workers and equipment to do it.
However, in much of rural and small town America the economy has been stagnant at best for years if not decades. Factories have either closed or automated the majority of their workers out of business, smaller businesses have been bought out and consolidated to urban centers, and the effects of that have been rampant in terms of stagnant property values, underfunded infrastructure and schools, less construction, more educated people moving out and so on.
The thing is, this economic contrast between urban and small town / rural is not a phenomena unique to the United States. Its true everywhere in the developed and developing world. Its the case everywhere regardless of whether you are in the US, Canada, Western Europe, or China. We have actually been fortunate in America because we have weathered this economic transformation / transition much better than any of our peer nations. While our economic growth has not been that great since the Great Recession, we have still enjoyed stronger and more consistent growth than any large developed nation on earth.