Unless there's some extra cache that hasn't been disclosed Strix Point is basically just 4 more CUs on a tweaked RDNA 3. It will likely be memory bandwidth constrained just like everything with the 680M and 780M are.
IMHO the Steam deck has created a new class of consoles, the potentially (but not necessarily) mobile ones that sit below current consoles, but offer a far greater range of usability (you can take it to your friends and play jointly) and simply enough power to have fun.
In other words: that race, where the next generation console always needs to be far faster, offer more resolution etc. than the older, may be over.
Mobile gaming is the biggest global money maker, vastly exceeding consoles and gaming PCs. And for those who want a better gaming experience than on mobile phones, the mobile consoles may just satisfy the vast majority of those gamers, that so far would have had to go with a console or gaming PC.
And with a Halo part or next generation devices, there will be again more options and an upward path.
Basically I believe they're likely to siphon off so much attention and budgets, the niche for the gaming high-end is getting too small to sustain its growth.
And then these mobile consoles are PCs, NUCs or laptops, too. At a level of performance, competence, compactness and versatility, where there is simply no need to buy a PC or laptop for kids, students or for non-corporate work.
Smartphones to my chagrin have kept shy of qualifiying as desktop replacements, Strix will pull out all the stops.
Of course this is all my personal projection, but I know that if my kids wanted a gaming rig and a student laptop today, it would be a single device, not two.
(They actually got my workstation cast-offs, but that's beside the point)