In my opinion, I think playing the real system on a CRT TV is way better then emulation.
The old systems were ment to be played on CRT TVs; the AV output, the cartridges, & how its played on a CRT makes it more of an experience & gives it its classic feel. I don't like emulation as much as I did back then. The CRT shaders on certain Emulators aren't the same as for playing on a real CRT TV.