Is there any way to browse only the demos that are from a game that's already been released?

[rookiebatman]

If I go to the Categories menu at the top of the homepage and click on Demos, I can browse all the games that have demos. But a lot of those games (especially the ones with new demos) haven't released yet. If I want to look at demos just for games where I could play the full version today if I like the demo, is there any way to filter for that? If I click to browse all demos, and sort by release date, it just goes off the release date of the demo, not the game.