they dont need to do anything, the Wii is still market leader, weekly, monthly, yearly and LTD, the Wii is still the best selling console, why would they worry?
only way they need worry is if any of the following happen:
PS3 outsells the Wii by a fair magin each week
360 outsells the Wii by a fair margin each week
PS3 and 360 outsell the Wii by a fair margin each week
my advice, dont hold your breath







