It's completely implausible.
Sony's stable of exclusive software has been excellent since the middle of the prior generation with the PS3- Microsoft isn't really close to them here, and it's difficult to see people that bought into the Sony ecosystem for Horizon, GOW, Last of Us, Detroit, Spiderman, Bloodborne and similar walking away from all that. I'm sure there are a handful of people that only care about marginal improvements in third party software, but these people are a vanishingly small part of the buying public.
Making things worse here- Microsoft has been pretty open about making their exclusive software available via PC. You don't actually NEED an Xbox to play those games. That makes the argument for jumping platforms much, much weaker even if you REALLY want to see what Obsidian is going to do next gen.
Microsoft is going the Play Anywhere approach in attempt to find a profitable sector in the gaming industry where they can grow, have presence and be profitable.
The strategies they've been implanting on the console space have not propel them to the spot they would like to be at which has resulted on Play Anywhere, Xbox Live being on Switch, Gamepass, taking the front seat.
Microsoft has realized Playstation has the traditional console strategy in a near-monopoly state.
This is them throwing ideas out hoping something sticks and lands. While in the process, ironically, they are actively harming the console hardware side of Xbox with Play Anywhere and lack of exclusives to retain users on their platform and / or incentivize potential consumers to own one.
On the software approach, it makes sense what the play is. But on the hardware approach, the number of units sold per year isnt going to marginally increase or see growth year over year with Play Anywhere being the front runner and exclusive output faltering compared to its competitors.
I really don't know what in general, the play is, at the moment with Xbox.
That's why I'm just eager to see what in the actual fuck is their next-generation strategy so it can put to rest the fuzzy messaging Xbox has adopted late this generation.
Next-gen is a whole new reset in mindshare. And concepts are fresh and new. I hope Microsoft conjures up something super dashing for consumers to eat it up, because the current strategy proposition set in place by Sony allowed them to lock the traditional console market all to themselves, gather a staggering 93 million PSN userbase and their 1st exclusives performing commercially and critically bigger than ever before.