@voljega technically, the pi3a+ is better than a pi0w. 4 cores than 1. 1.4 Ghz than 1.0. And same RAM.
@joinski @cjiniinni what about the heat in the console ? You can't extract it i guess. And how much time lasts your 8000 mAh battery while playing ?
Unfortunately, I see a lot of issues.
First, the Pi3A+. We already have some memory issues with the 3B+ and its 1Gb. With 512Mb, you won't be able to launch the PSP emulator (As it requires a 256Mb chunk of memory).
What about the cooling system? Not cooling a 3A+ would be a very bad idea as it may raise quicky 70°, which is now the 1st threshold of throttling (actually at 70° the 3A+ drops 200Mhz instantly)
Then, the screen. That's a nice resolution. But way to high for such boards. We recommend not to use higher than 720p resolution on RPi board. Not only because of performance hits, but mainly because of, once again, GPU memory.
Having 2000x1500 pixels requires 12Mb of memory for a single RGBA image. That means with 20 active systems running with a theme like Next-Pixels, all the VRAM would be eaten and you wouldn't be able to run any emulator!
Even with the default recalbox-next theme, things would become very complicated beyond 30 active systems.
To sum up, having a resolution that consume 3.41 times more memory than a 720p resolution running on a board with half memory seems not a good idea.
I actually have a small fan inside, you can see the air intake and outtake here:
And there is no problems with the resolution. Because I changed it in config.txt to run in 1024×768 ;)