Emerging trends in 2D nanotechnology that are redefining our understanding of “Nanocomposites”

•Using semi-infinite 2D materials as nanofillers can achieve mechanical and functional reinforcements at the Platelet Limit.•New techniques like folding, scrolling, and stacking can produce new forms of nanocomposites with well-dispersed 2D inclusions.•The concept of a 3D macroscopic body comprised exclusively of 2D topology leads to nanocomposites with exotic functions.•A key challenge is to scale up the production of large-area, high-quality 2D materials at a lower cost.