The Xbox One hasn't been smashed in the USA despite being the clearly inferior console, that's why an XSX at the same price of the PS5 would gain market share. We already know that the XSX is more powerful than the PS5 and it's also looking likely that the XSX will have the better launch titles, so at least in the USA the XSX would be chosen over the PS5. That may only be a single country, but it's the biggest country for the console market by far and has a long history of not pledging loyalty to any console manufacturer.
The Xbox X was more powerful than the PS4 and didn't change the sales or perception, your folly is thinking the ps4 gain traction from it's power at the start of the generation. This thread is nothing about the US but world wide sales and America is making up less less of the overall world wide sales as gaming grows in South America, Asia and the Middle East.
As for launch titles we have no idea what will be there but we do know that all xbox series x titles will be also on the xbox one, so why do people need to upgrade, why's it any different than the xbox one X. Microsoft need to sell another upgrade to the xbox one X that will be tough sale.