I agree that this is a problem, but how will Windows users be affected by this change?

Here is the issue, I think:

• With the Linux client, under "Popular New Releases" "Top Sellers" "Upcoming" "Specials", the tag SteamOS + Linux is OFF, while Windows and Mac OS X are ON.
  The code that manages "Narrow by OS" is just inverted.

Steam Devs should just fix the code about this.

Yep, it’s been an issue forever. Steam should store separate release dates for each platform and use the good one depending on the OS it is running on.

With the Linux client, under "Popular New Releases" "Top Sellers" "Upcoming" "Specials", the tag SteamOS + Linux is OFF, while Windows and Mac OS X are ON. The code that manages "Narrow by OS" is just inverted.

Yeah this makes the tabbed section at the bottom mostly useless. Devs, please fix!

This issue is a different one though, looks like this bug is more related: https://github.com/ValveSoftware/steam-for-linux/issues/4448

Yep, it’s been an issue forever. Steam should store separate release dates for each platform and use the good one depending on the OS it is running on.

Exactly, they just need to add additional release date fields for games so that if it's new on a particular platform, it can show up in the new games sections for that platform.