The purchase is massive in terms of quality IP and new studios, but I think there has been a little bit of an overreaction. MS will own some great franchises, but they still need to decide to make something of them. Putting them on gamepass is great for those on gamepass but most serious gamers would/should have played these titles by now. I mean seriously who hasn't played elder scrolls or fallout 4 by now....
So unless they fund a new wolfenstien (and not like the last hot mess which was shockingly bad) or a new prey, then these are just Ip's that are available.
I think the key IP's are doom, Elder and Fallout, and a new Elder/fallout won't be coming for a good few years, so the benefit of them won't hit until then, elder scrolls was reportedly still about 5 years away...
So I guess what I am saying is, when those titles hit, its going to be a hard decision for people what to do depending on what platforms they are on, until then, they've just got some great IP that some people might not have played. So I think maybe we can all just calm down a bit until then :D - no doubt this purchase is a longer play by MS and certainly covers some areas they were particularly weak in (open world games)... It could definitely be game changing, but longer term.... so do I need an xbox ecosystem - for the moment the answer is still no. If in the future theses titles are available on Steam/PC without gamepass the answer is still no. Of course this will definitely drive people to pay for gamepass, even if its just for a month at a time.