Okay. So this can mean practically anything, but it does seem that Microsoft and Sony are hooking up in some way that may have gaming implications.
Below are snippets of an official press release from the Microsoft News Center:
“Sony is a creative entertainment company with a solid foundation of technology. We collaborate closely with a multitude of content creators that capture the imagination of people around the world, and through our cutting-edge technology, we provide the tools to bring their dreams and vision to reality,” said Kenichiro Yoshida, president and CEO of Sony. “PlayStation® itself came about through the integration of creativity and technology. Our mission is to seamlessly evolve this platform as one that continues to deliver the best and most immersive entertainment experiences, together with a cloud environment that ensures the best possible experience, anytime, anywhere. For many years, Microsoft has been a key business partner for us, though of course the two companies have also been competing in some areas. I believe that our joint development of future cloud solutions will contribute greatly to the advancement of interactive content. Additionally, I hope that in the areas of semiconductors and AI, leveraging each company’s cutting-edge technology in a mutually complementary way will lead to the creation of new value for society.”
“Sony has always been a leader in both entertainment and technology, and the collaboration we announced today builds on this history of innovation,” said Satya Nadella, CEO of Microsoft. “Our partnership brings the power of Azure and Azure AI to Sony to deliver new gaming and entertainment experiences for customers.”
Microsoft News Center

Even Phil Spencer giving props:
This may turn out to be nothing, but it seems that perhaps Sony and Microsoft are taking Google Stadia as a threat. Enemy of my enemy stuff.
[Source: Microsoft News Center]
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