The Verge has learned that Microsoft is working with Asus to launch its first-ever Xbox-branded handheld console. This is different from Microsoft's own SKU slated to debut sometime in 2027. https://www.notebookcheck.net/Asus-to-launch-Xbox-branded-handheld-gaming-console-later-this-year.977836.0.html
Ok, there might be some GOOD news in here.
IMHO: the full blown BLOATWARE that is WIN11 in a handheld ought to be considered almost criminal so if Microsoft can pair the OS down to only what might be needed to play games and support their Xbox store/front end that could be a bit win here.
The above might/could be the 'secret sauce' a Xbox gaming handheld might have over their competitors.
Else wise, the possible available hardware is limited at best. Toss in an APU with 'generational improvement' over the Z1 on the iGPU side and now your talking meager (at best!) battery life and cooling solution challenges.
If they DON'T provide a device that can break away from the pack performance wise, it just becomes yet another under powered hand held but with 'Xbox' branding on it. Meh.
So toss something good in there and under clock like crazy or ???
Only time will tell.