Do prebuilt arcade machines with these type of things in them

Yeah they're emulators running on ARM Cortex CPUs

>>4093498
But are they decent emulators and do they have an acceptable amount of input lag?

>>4093517
"Decent" and "Acceptable" are pretty subjective. Lag is quite low since input is direct, there's little to no OS overhead and output is in native mode. On the other hand, the accuracy of the emulation itself is often not great.

>>4093517
They're the easiest and cheapest way to get a lot of games in a working cabinet without dealing with all the hassle of putting a pc in there, but the emulation is only serviceable. Good to play with friends or just relax with a quick gaming session.

>>4093496
They're emulators and like all things Chinese there are clones of clones of clones with varying levels of quality. They range from complete shit to high quality you can actually play fighting games on. Don't spend much (or anything) on one of these until you really understand what you're buying.

>>4093517
I thought ARM/RISC-based systems usually have more input lag than x86 stuff, but I could be wrong. There's always some discussion of Raspberry Pi input lag every other day here.

>>4093527
>accuracy
Not OP, but how many system bestsellers are unplayable?