Microsoft definitely made an appearance in E3, but it was all about their Xbox consoles. Xbox Head Phil Spencer talked to Polygon about the absence of Windows/PC games in the event and its importance to the company.
"E3's a retail show," he said. "It's a retail show, it's a console show, so it didn't really feel like the right place for us to talk about Windows, but Windows and gaming on Windows is critical to Microsoft's success."
However, he is quick to assure the importance of PC games and which events they are a better fit in. "When we're doing gaming strategy, gaming focus inside the company, that's my job. I think in a lot of ways, you could argue gaming on Windows has never been more healthy in that the biggest of the big franchises, League of Legends, World of Tanks, those things dwarf a lot of what we're doing in this console space in terms of users and monetization. They're all on PC," he said.
Additionally, he believes that huge world championship events fill up arenas and that it's possible space for PC games to prosper. He also closed by maintaining that E3 is a "console show."