Which do you think is Nintendo's most groundbreaking system, and why?

[siebensus4]

I think the N64 is the most groundbreaking system. So many features were introduced with this system, which are still today's standard:
- Local 4 player possibility
- Controller with rumble feedback
- Controller with analog stick
- technically you can also say the c-buttons for camera control, which are put on a second analog stick nowadays

I think we haven't seen something that big of a change like from 2D pixel to 3D polygon graphics since then.