The big question with that plan, though, is what’s in it for Valve/Epic? Valve has no incentive to let anyone else in on their cut, and Epic’s is so low already there wouldn’t be any room to let anyone else in on it with them.
I suppose Epic could try to get a deal in place where EGS is installed as the default store on the Ally or Legion, but it’s not like anyone’s going to just stick with the default - first thing anyone will do is just install Steam, and everyone knows it. I don’t see a way for a deal like that to make sense for Epic to even bother with.
Fair points, yes, but I was speaking within the context of companies that are actually producing handheld PCs. None of the other potentially capable companies you’ve mentioned have shown any indication that they care to enter the space.