I think Sony don’t have to do much to succeed next gen (at least at first), as they are going in with a clear advantage. The traditional console model is working wonders for them, so I expect them to follow suit and go with a very conservative launch.
I reckon we’ll see a single machine (at first) that’s a good bit more advanced than current gen systems, although not as powerful as the top-end Series X. It’ll come out in the usual price bracket and will feature a strong first party line up. It will have some snazzy features such as ray tracing and fast loading times, also the CPU leaks suggest it will have support for PS4/Pro games built in on the silicon level, so will feature full back compat with your existing game library, which will be a big draw for early adopters.
Sony’s marketing will be simple - here’s the PS5, it’s shiny, look at all the good games we have. The Series X stuff is going to be hard to market by comparison, and we know from experience Microsoft generally struggle to market their gaming products. MS have to sell consumers on a whole new business model. Long term Microsoft are probably ahead of the kerb, but I think Sony will maintain their current-gen advantage for a while
Honestly, I’ve found the Xbox experience so crappy this gen Microsoft still have work to do to win me back. Yeah, game pass is good value for money, but I’m struggling right now to see why I would buy a Series X over a PS5. I mean I’ll end up buying both, but right now I’m leaning heavily towards PS5. Of course this could all change when they are finally revealed. We still don’t know much.