As stated at the official website the evolvement is implemented to depict the current PM reality.
PMI states the following:
Ways of Working: Whether it’s predictive, agile, design thinking, or new practices still to be developed, it’s clear that there is more than one way that work gets done today. That’s why we encourage professionals to master as many ways of working as they can – so they can apply the right technique at the right time, delivering winning results.
Power Skills: These interpersonal skills include collaborative leadership, communication, an innovative mindset, for-purpose orientation, and empathy. Ensuring teams have these skills allows them to maintain influence with a variety of stakeholders – a critical component for making change.
Business Acumen: Professionals with business acumen understand the macro and micro influences in their organization and industry and have the function-specific or domain-specific knowledge to make good decisions. Professionals at all levels need to be able to cultivate effective decision-making and understand how their projects align with the big picture of broader organizational strategy and global trends.
And because today’s projects demand a broad set of skills and capabilities, PMI will continue to focus on giving you the tools and insights you need to develop new skills and tackle your next project challenge. This update to the PMI Talent Triangle will help you to navigate our profession’s ever-evolving landscape with confidence.”