A leaked email allegedly from Phil Spencer, the Xbox head executive, has given some ambiguous details about how Microsoft and Xbox will challenge Google's recent massive announcement about its Stadia game-streaming service. It seems something big is going to happen at E3 though, which officially starts on June 11.
https://www.notebookcheck.net/Microsoft-s-response-to-Google-s-Stadia-Going-big-at-E3-with-possible-xCloud-or-Xbox-announcements.414838.0.html