The NES, no contest whatsoever.
to put it another way
The NES was the Old TV where you got channels 2-9 and nothing else. It penetrated the market and created home entertainment as we know it. The SNES was color TV, N64 and PS1 was the large 36" CRT's, PS2 was early 480p LCD's, and Wii, 360, PS3 are modern HDtvs.
Although the later creations were much more advanced and offered much more, it is thanks to the original that we have what we have today.







