The Xbox has been on the tail of the PS4 for a while now, mainly due to the lack of exclusives and losing exclusive games due to cancellations. However, they are already in the development of the next Xbox console but it looks like that are planning to release another console that will focus on game streaming.
This information comes from anonymous sources that mentioned a Microsoft could game streaming service, codename Xbox Scarlett Could and they will be developing a cheap console that caters to could gaming. Generally, the console will come with simple hardware that will be enough for streaming content from the could but Microsoft will also release a full-fledged Xbox console with all the beefy hardware.