Battery tech and x86 chip tech doesn’t really make a “powerhouse” handheld possible, unless you completely abandon the idea of it having any acceptable battery life.

There’s talk about the next few years being when arm and risc-v will start to replace x86 for windows/Linux, and that could possibly make a big difference. But I also imagine game compatibility and performance will be pretty poor starting out, so it’ll be quite a while I imagine.