The economic improvement does not appear to have significantly impacted the racial composition of the borough, suggesting that the increased prosperity has primarily benefited the existing population rather than attracting a more diverse influx of residents.

The demographic stability of Tower City contrasts with national trends towards increasing diversity in many urban and suburban areas. The borough's racial homogeneity and slow population growth suggest it may be a more rural or isolated community, potentially less affected by broader demographic shifts seen in more metropolitan areas.

Based on the observed trends, Tower City is likely to maintain its low diversity categorization in the near future. The consistent demographic makeup over the past decade, despite economic improvements, suggests a stable community with limited in-migration.

If the economic growth continues, the borough might begin to attract a more diverse population, potentially transitioning towards a transitional community in the longer term. This would be characterized by a gradual increase in Hispanic residents or those of two or more races, as indicated by the brief uptick in 2018.

The steady increase in median income, if sustained, could eventually lead to increased housing costs and potentially attract a more diverse, higher-income population. However, this transition would likely be slow and gradual, given the strong demographic inertia observed over the past decade.

In conclusion, while Tower City has experienced economic growth, its demographic composition has remained stable. The community is likely to remain categorized as low diversity for the foreseeable future, with any transitions towards increased diversity occurring at a very gradual pace, if at all.