PS3 still cost 299$.
What makes people think, that 199$ costing PS3 won`t sell like hot cakes?
If already, when PS3 reached 299$, it sold over 1m in 1 month.
PS3 reached 33.5m(shipped) mark by the end of December 2009, while x360 passed that mark just in September 2009. That is only 1 quarter difference.
By the way, why amazon.com have problems with PS3 supplies?