Nice idea, but don't think you can just drop a CRT and a joystick in a backpack. The weight, cooling, power budget, and connector pin‑compatibility are all real constraints. You might want to prototype on a small OLED first, then scale up.

Nice plan, but the Pi Zero is a pain for emulation—1GHz and only 512MB RAM is borderline for NES, SNES, or even classic MAME. If you want smooth gameplay, aim for a Pi 4 or at least a Pi Zero W with a better GPU and 1GB RAM, and make sure you pick a low‑power driver like the SSD1306 for the 1.3" OLED. Also double‑check that your emulator’s frame‑rate cap matches the OLED’s refresh rate; otherwise you’ll get stuttering. Power‑wise, a 10,000‑mAh bank is fine, but add a step‑down regulator for the Pi and a separate line for the display to keep the noise down. Once that prototype runs cleanly, you can start experimenting with the cabinet chassis, maybe a 3‑axis accelerometer for vibration feedback, and then we can worry about aesthetics.