Online piano teaching represents a burgeoning sector of the music education industry. Increased access to digital resources and technological advancements has revolutionized the way we learn music. As we traverse further into the digital age, the future of online piano teachers is expected to see notable changes, trends, and predictions, which will shape the landscape of this innovative educational industry.

The paradigm shift from traditional to online piano teaching is underpinned by digitization. This transformation has democratized learning, making it accessible to everyone, regardless of geographical barriers. Online piano teaching has emerged as a flexible, cost-effective, and interactive method of learning, with its roots firmly entrenched in technology's potential.

However, predicting the future of online piano teachers necessitates a comprehensive understanding of how technology and pedagogy interact. The interplay between these two domains hinges on the Diffusion of Innovations theory proposed by Everett Rogers. According to this theory, innovations undergo a process of diffusion through social systems, with different groups adopting the innovations at different rates. In the case of online piano teaching, this adoption rate will rely heavily on the availability and accessibility of technology, as well as the willingness of both teachers and students to embrace it.

One key prediction for the future of online piano teachers is the increased use of Artificial Intelligence (AI). AI has the potential to transform online music learning through adaptive learning systems which can tailor content to the individual needs of each student. AI-powered tools could provide instant, constructive feedback to students, enabling them to correct mistakes and improve their technique in real-time.

Even though AI presents an exciting frontier in online piano education, it's essential to understand the trade-offs. AI systems, while promising hyper-personalized learning experiences, may lack the human touch that is crucial in music education. The emotional connection and mentorship provided by human teachers are hard to replicate digitally, presenting a significant challenge for the implementation of AI in this domain.

Another notable trend in the future of online piano teaching is the increasing prominence of blended learning. Blended learning pertains to an educational model that combines traditional face-to-face instruction with online learning. In a piano teaching context, this could involve one-on-one lessons with a teacher, supplemented by digital resources and online self-learning modules. The main advantage of blended learning is its ability to combine the best of both worlds, providing the personal touch of a teacher and the flexibility and accessibility of online resources.

The potential pitfalls of blended learning, however, include the risk of over-reliance on technology and the possibility of widening the digital divide. As technology becomes increasingly integral to education, those without easy access may find themselves at a disadvantage.

The future of online piano teachers also sees a rise in the use of Virtual Reality (VR) and Augmented Reality (AR) in music education. These immersive technologies can create interactive, engaging, and realistic learning environments for students. For example, AR could be used to overlay digital notes onto a real piano keyboard, helping students learn to play more intuitively.

However, the prohibitive costs of VR and AR technology may limit their widespread adoption in the near future. Moreover, the effectiveness of these technologies in music education is still open to research and debate.

In conclusion, the future of online piano teachers hinges on the successful integration of technology with pedagogy. As the digital landscape evolves, so too will the methods by which we teach and learn the piano. We must be cognizant of the potential drawbacks and challenges that these technological advancements present, and strive to devise innovative solutions that harness the best of both digital and traditional teaching methodologies. The end goal remains constant - to make piano learning a fulfilling, accessible, and enjoyable journey for all.