Instead of checking Steam's latest releases, which are the games lucky enough to actually get onto Steam, check other markets, like Desura[0] or Steam Greenlight[1]. There is an overwhelming amount of indie games, most of them mediocre at best. You only remember the very few polished games.

[0] http://www.desura.com/games/browse/?filter=t&kw=Search+...&s...

[1] http://steamcommunity.com/workshop/browse/?appid=765&browses...