Would the 360 still dominate NA if PS3 gets a price cut

[Troll_Whisperer]

D-Joe said:

MarioParty619 said:
they would if ps3 get's a 50$ price cut but once the playstation or if the playstation get's cut to $199 it will be near unstoppable remember 3d blu ray is getting bigger and bigger and with a gaming system with a free online it will be hard for the xbox to top that up remember for a $199 price point people will eat that up

plus with the money trouble's the world is having right now consumer's will look for what's the best for the cheapest price.

even in Japan,BD...

 

(first half of 2011)

What's the source for that graph?