We caught this Google test this morning. It is looking like Google is testing moving the Knowledge Panel from the right side and integrating within the search engine result pages (SERPs). Earlier in the year, Google removed the paid ads from the right side to present a desktop experience that aligned more with the mobile experience.
It looks like Google started testing mobile-style card search results back in May. The few examples in TheSEMPost article are showing different types of layouts for news, local search, and recipes. So I guess Google is testing this more and I would assume that it could be rolling out to more people.
Here is how the Knowledge Panel is typically rendered on a Google search result page.