This reasoning is why I'm keen to try out RomM[0], a ROM library manager that has EmulatorJS[1] built in. Rather than having to setup emulation on each device where I want to play a simple game, I can instead use this combination to do it from any web browser on my local network.
[0] https://github.com/rommapp/romm
[1] https://github.com/EmulatorJS/EmulatorJS