I need to see more as that trailer was really just setting the tone (which is all it had to do for a teaser), but this could be great. Seems like after all of these years of acquisitions and fairly dry years for Xbox, we're finally starting to see games come from these acquisitions. Still not sure that that does anything for Xbox's popularity since they release everything on PC, but I think Microsoft's main "console" if you will is shifting from being Xbox to Gamepass since that covers both the Xbox AND PC.
Gamepass also has support in other places now, too, so there's many ways you can give Microsoft your money to play their games, making it far less necessary to buy an Xbox (whereas Sony holds onto their First Party games as exclusives until quite awhile after launch, usually multiple years).