Because when people are actively fighting to be top dog, it leads to fun developments and innovation.
Look at ALL of the software updates the XBO has been getting lately. It's kinda insane. If both companies are fighting for top, then they'll both be trying just as hard.
They'd be rolling out the updates anyway and them being behind as much as they are hasn't lead to a change in their ID@Xbox policy.
Competition fosters not only creativity, but better prices for gamers. Perhaps it's boggling to the fanboy mind... but for the rest of us, we've had enough Ma Bell and Madden, thanks.
Do you believe that because Sony lost this month they're gonna start giving budgets out for more creative games or are those games already in development meaning that Xbox winning a couple months doesn't affect what they're doing, creative-wise?
Gamers make it so there's better prices for gamers. That's the free market. The market has dictated that people prefer the PS4 to XBO so XBO has to do things to improve it's value in the eyes of the consumer, price cuts being one of them. The market forced Xbox to cut its price, a couple lost months in the US will not affect Sony's plans of when to cut the price of the PS4.
People expect way too much from North America sales parity.
Edit: And it's a difference of only 13k? People think this is gonna change things?