Dont think this anouncement changed much to be honest. Still got to remember that the x1 will still play all the games at least through 2021, so theres still no urgency to upgrade. Some games will require a ps5 day one. If sony still goes disc $500 and digital $400, they still will win by large margins.
Some are saying now that they want to undercut MS and go $450 and $400. But I really dont think they need to. Would be overkill if they did.
I think they wont sell PS5 for less than 499, they want to make profit.