Android on MIPS will not look so bad.
We still get the many Game Maker studios out there (they have MIPS libs built-in), plus the Java-only games and some open-source apps. (like Firefox and some games)
That alone is more than what the GCW-Zero currently has.
Unfortunately, there won't be another GCW-Zero with better specs due to ARM manufacturers being hostile to open-source by not making their drivers open-source.
You'll be lucky if your device supports U-Boots with 2D acceleration.
The only open-source boards are out there are the MIPS ones, the Tegra dev boards and the Raspberry Pi if we dont count the firmware.
We could make our own GCW-Zero 2 using raspberry pi 3s and Gmenu2x :DDDDD