Apple does also hold a Design Awards at WWDC.

The use of “created by the best” in the invite refers to iOS and Mac developers who create third-party apps and hold up the App Store ecosystem, helping to sell millions of Apple devices a year.

This end of year celebration of apps and games will also champion Apple’s successful launch of Apple Arcade, it’s paid gaming service. We’ll wait to see how self-congratulatory the whole thing is. It's unlikely that Apple will use the event to announce new hardware, but we can dream.