Because 320 by 320 is not very good.
Well, depends on your perspective and what you’re doing, so in some respects 320 × 320 is a lot.
Unless you’re building yourself a PicoMite with larger panels, like I’m doing, then not currently. I’ve got 800 x 480 on a 7”, and 480 × 320 on a 4” LCD.
I’ve seen 480 × 480 panels that are physically the right size, but they’re not going to be compatable with the PicoCalc. I believe there are people on the forum looking at alternatives, but there’s nothing definite… and if the PicoCalc is using a unique pinout on the ribbon, it means a custom batch run, and that’s going to take a bit or resources.
The SPI interface PicoCalc now using have no enough bandwith to drive higher resolution（event now to reach 60fps @ 16bit color still need some efforts）
If you are looking for a daily use handheld mordern computer，Just get an uconsole
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