On the contrary... I think this is exactly how you announce stuff like that. First off, they are not going to say everything is going multiplatform. They will NEVER say that, even if that ends up being the case sometime down the road.
What they will do though is talk about how they decided to put smaller titles like HFR and MP-focused titles like SoT on other platforms. And how that is because they are pro gamers and want as many people as possible to get to experience these games and how they are not fans of the traditional console walled gardens. Then they will talk about how committed they are to Xbox and GamePass, and then announce how they will be adding so so and so Activision games to gamepass which shows their commitment to their fans.
Then they will say they have no plans on leaving the console hardware business and already are well in the development of their next console. And then may even announce price drops of the current consoles, and probably say something about how December was the best December for Xbox series consoles ever....
And as for future games, the most they will say is that they will treat that on a case-by-case basis, and how they give the freedom of that kind of choice to their studios, so if a studio of theirs wants to bring their game to other platforms, they will try and see if they can make that happen. And they would make a case how a lot of those studios were multiplatform before, so they are not sure thats something they wanna take away from them and the industry. they won't, however, reiterate (cause they have said it before) that Xbox exclusives, past, present and future will remain Xbox exclusives because doing so locks them into that commitment. So it would be left open-ended.
And they will say all this as matter of factly as possible that you would come off thinking it was like this all along.
Yup, a PR salad, thats what this is. At least, thats what I think it is going to be.