Microsoft has confirmed it will hold a physical showcase of its upcoming games in Los Angeles this summer.
The news was revealed at the end of a blog post summing up the announcements from last night's Xbox Developer Direct.
While it gives no details or specific dates, the reference to the "return [of] our yearly showcase" suggests it's highly likely to be held in June around the same time as E3.
source https://www.gamesindustry.biz/xbox-to-host-summer-showcase-in-los-angeles-later-this-year