Why bother? You can get an sbc PC with a decent agpu, throw SteamOS on it and have the little PC console of your dreams. There's a few good 6600U ones online. $300-$400. You'd dwarf the library of an arm console limited to Android, even with emulation.
I really hope the rumors they’re pulling the OLED out are wrong. I love playing in handheld and that screen would really pop with some added horsepower.