Clearing the leaves from your lawn is part of a set of practices and displays involving the lawn that are related to social class. This includes a green lawn and a weed-free lawn. However, will these practices be disrupted if new recommendations suggest leaves should stay on the lawn because they are good for the grass and soil?
I can imagine this as part of a new set of lawn practices in the coming decades. This could include less grass. Grass that is not necessarily green. Fake turf. More stones, gravel, and rock. No watering. Smaller yards or no yards. Overall, less emphasis on a particular kind of lawn and more variety.
But, this could take a while. Practices regarding clearing leaves have a long history. Social norms take time to change. It could happen in a few communities or among influential people that lead the way. Maybe it requires some influential social media actors.
In my own yard, in recent years I have cleared a good number of the leaves and left others. Some get blown away and others buried by snow. Not every leaf has to go. Some stay in the bushes and beds. This year, I piled some leaves in a new garden we started earlier this year. We will see what is left in the spring and how the new growth begins.