The landscape of background checking companies, much like the topography of the tech-driven world, is in the midst of seismic shifts. This article will explore the nascent trends and predictions for these enterprises that provide vital services to many sectors. We'll delve into the underpinning factors driving these changes, scrutinize the implications, and examine the potential trajectories, all while maintaining a palpable sense of reality in our conjectures.

In the embryonic stage of background checking, the process was painfully tedious, manually executed, and fraught with errors. With the advent of technology and digital databases, the industry underwent a significant transformation. The modernization of background checks enabled these companies to extend their services to a variety of sectors, including employment, law enforcement, tenant screening, and online dating, to name a few.

However, as the adage goes, "change is the only constant." The evolution of the background checking industry is far from over. The next frontier lies in the realm of Artificial Intelligence (AI), Machine Learning (ML), and Blockchain technology.

AI and ML have been making significant inroads, with algorithms being crafted to 'learn' and 'improve' over time. These technologies could bring profound changes to the industry, making background checks more efficient, accurate, and unbiased. By leveraging AI and ML, companies can process vast amounts of data more quickly than human operators could even dream of. They can also identify patterns and anomalies that would typically elude human eyes. Moreover, these technologies can significantly reduce the risk of errors and biases that can creep into manually performed checks.

But this doesn't mean AI and ML are without their limitations or challenges. The primary concern is the "black box" problem – the lack of transparency and explainability in how these advanced algorithms make decisions. This opacity could pose legal and ethical challenges, especially when adverse decisions are made based on background checks. Consequently, this necessitates the development of robust regulatory mechanisms and ethical guidelines to ensure fairness and accountability in automated checks.

Turning to Blockchain technology, it has the potential to revolutionize the verification process in background checks. By creating a decentralized and immutable ledger of records, Blockchain can provide a highly secure, transparent, and tamper-proof system for storing and verifying background information. This could also expedite the verification process, as companies wouldn't have to rely on traditional, time-consuming methods of information verification.

Again, the potential of Blockchain isn't devoid of hurdles. The primary issue is the nascent state of the technology itself, coupled with the lack of widespread acceptance and understanding. Furthermore, privacy concerns surrounding the sharing and storing of personal data on the blockchain are another deterrent.

It's noteworthy to consider the socio-economic context in which these technologies are unfolding. The gig economy, characterized by temporary or flexi-time contracts, is on the rise. This trend necessitates rapid and efficient background checks, thereby accelerating the adoption of advanced technologies.

In the macroeconomic context, globalization has led to increased cross-border mobility, complicating background checks. This challenge may spur the demand for international databases and AI-driven algorithms capable of interpreting and processing data from multiple countries in various languages.

In conclusion, the future of background checking companies is set to be shaped by emerging technologies, socio-economic shifts, and regulatory developments. While AI, ML, and Blockchain hold immense potential, their adoption and evolution will be tempered by legal, ethical, and technical challenges. In this rapidly changing landscape, companies need to be agile, adaptive, and ethically responsible to stay relevant and competitive. The future may hold uncertainties, but one thing is certain: the background checking industry will not be the same again.