In an interview with Polygon, Microsoft claims the reason why they didn't bring Windows games to the E3 show is because they consider this expo to be the wrong venue for PC gaming. Xbox head Phil Spencer argues that the E3 is a retail show primarily oriented towards consoles and thus not the right place to talk about PC gaming.
If E3 isn't the right place, I asked, then what is?
"Well they do these huge world championship events and they fill up arenas," he said. "I do think there could be a space there.