The video shows off some Kinect action and gives a bit of hugging action toward PC too, remember Microsoft being quoted as "doubling down" on PC gaming. The companies WGX team which is comprised of all gaming-related attempts between Microsoft platforms has been quite hard at work, obviously. Let's hope that this work goes toward something new and exciting.
A LinkedIn ad that has since been removed gives you more of an idea of the team's work:
The Windows Gaming Experience (WGX) Team is a very passionate team embarking to create a new world-class gaming platform that comes alive in the presence of services and leverages the power of the PC to help define the next generation of Windows and Web gaming to 300 million potential customers. WGX team is realizing its strategy via the delivery of Windows and Web gaming solutions built upon existing available services (internal and external to Microsoft) as well as building as needed Azure-based services to enable this vision.
We are at the early stages of defining and architecting and developing excitement around gaming in Windows and the Web. We have a highly visible company-wide charter to promote gaming and empower game developers to create compelling, immersive, rich experiences in Windows and on the Web. We are on a mission to make games a first-class citizen in Windows through our efforts and in collaboration with other groups across the Interactive Entertainment & Devices (IEB) division.