Homebrew demos, require emulation such as of the CPU, graphics,
pads, sound, etc.. (depends for what the demo was made). But the
emulation required for those are not as advanced as in commercial
games. The demos are developed to get things started etc. nSX2
emulates an amount of the PS2, which makes it compatible with lots
of demos, but it is still not advanced enough to get commercial games
working. Time will tell!
