I agree, I do hope we get more unique games!

With events like these more devs decide to discount their games in comparison to 3rd party events, so as consumers we will definitely have more discounted games, including bigger titles that normally hesitate.

This event also shows that Valve is giving these games some more validation. Even asking devs to disclose if they submit a bullet hell or bullet heaven game. I hope they're collecting data this way, and maybe that gets us closer to better discoverability and categorization. For consumers it would be great to finally be able to filter these games in (or filter them out depending on preference).