Cloud gaming accessories also on the way from Razer, Nacon, PowerA and 8BitDo.
Microsoft will livestream developer panels for content originally planned for GDC 2020.
Integration with Game Pass and DualShock 4 support have also been confirmed.
Sign-ups are currently live for the US, UK and Korea.
Microsoft had a fair number of big reveals and announcements at its presser.
Microsoft's streaming service will launch with support for over 3,500 Xbox One games later this year.
Microsoft’s Mike Nichols is skeptical of Google’s ability to compete.
"We have as much a shot to build a subscription service as anybody else," says the Microsoft CEO.
The Xbox boss believes streaming could help further the cause of all parties involved in the gaming industry.
“We’re building a service that’s consistent with the speed and high fidelity that gamers expect on their PCs and their consoles.”
But, Microsoft says, it won’t replace Xbox itself.
"Our goal with Project xCloud is to deliver a quality experience for all gamers on all devices."