Google will host at next month's Game Developers Conference (GDC) a mysterious keynote without clarifying what they will announce.

The company has started emailing invites to members of the media today, inviting them to “gather around” for a Google keynote that simply promises “all will be revealed” on March 19th at 10AM PT / 1PM ET. Google’s cryptic invite includes an animated GIF with an explosion of light in a hallway.

On the description page, Google makes it clear that they are preparing to release a new product or service as two of the sessions are being called pre-launch best practices, and strategies to improve performance post-launch.

Google has previously shown off its work in creating the Project Stream game-streaming platform and this could be the first public trial of the new platform.

Microsoft is also planning its own xCloud game streaming service, with public trials scheduled for later this year. Amazon also appears to be readying a similar service, while both Nvidia and Sony are already streaming games over the internet.