Well, like before the game crash of the late 80s early 90s, the problem is:
That although the cream always rises, it's getting blocked by the shit that also floats. This change by steam is an attempt to prevent shit from floating, and thus, a step in very good direction.
Much like the "Nintendo Seal of Approval" restored faith in gaming (God remember when Nintendo made good games?), this step is basically a "Steam Seal of Approval"