Sony is their main competitor. They dominate and wins unless they act complacent.
On technological front, from what we know Rumble was on project before N64 controller was knew, PSEye came before Wii same as boomerang and Sixaxis for motion - PS Move being an evolution of PSEye and Sixaxis concept - plus Cell was a really try-out on technology besides DVD and BR tried before by Sony.
duduspace11 "Well, since we are estimating costs, Pokemon Red/Blue did cost Nintendo about $50m to make back in 1996"
Mr Puggsly: "Hehe, I said good profit. You said big profit. Frankly, not losing money is what I meant by good. Don't get hung up on semantics"