[Wofiel]

Ideal might've been to put a URL to image dumps on the NFC, spend a few seconds downloading, store them somewhere then run them in the emulator.

[digi_owl]

True, but as this was a Pi2, it would either require a usb wifi dongle, or leaving the ethernet plugged in all the time.

[bobajeff]

That implies it would be redownloaded every time rather than just the check for the ROM first and download if absent.