About the event, we could have a "welcome" video for all employees and a derivative used as a PR advertising too, because none of these studios have been consulted for an acquisition or to produce software exclusively, it was only on hands of owners.
To all people who've answered my post about how it would impact Zenimax : my question was too vague but I didn't mentioned the PS - "half of the market" for me includes Nintendo and the potential of all futur projects, and ratios can vary between platforms from games to games and between full apps and DLCs revenues. I packed grossly what it can represent financially among many third-party publishers.
I have no doubt it makes sense for Microsoft, but consequences for the branch acquired are less evident, to being deprived of the other two consoles and to produce under a subscription economy. Because for MS it's like buying GitHub, Minecraft or Linkedin : an essential part of the value is in the brand, and mostly in customers of these services, not in the service itself technologically.