I think they won't announce any new console hardware or accesories.
Apparently they plan to release PS5 Pro in fall, so the announcement would be around September, not now.
They already released a gazillion gaming accesories in 2022 and 2023.
If they announce something in the gaming hardware side, I think it would only be a 30th anniversary edition of the PS5 Slim and Dual Sense, plus maybe a Bravia PlayStation tv, a gaming focused tv line with best in class latency, motion blur, etc.
Here at CES they'll talk more about cameras and their car, plus maybe some tech to improve images and videos recorded or streamed using the tech from recently acquired iSize company.
Regarding gaming maybe they have there Jimbo to say goodbye (not likely, since he's tired from travelling), update the PS5 sales numbers, show a game sizzle of 2024 games -probably the one we already saw-, maybe announce some PC port and maybe they could announce or show some tv/movie adaptation of a PS IP (like GoT).
Less likely, but I think still possible, they may announce that later this year they'll release PS cloud gaming on smartphones, tablets, tvs (and PS Portal).