If they drop to 149 its to help clear stock, and will have the added effect of hurting the Wii U if its price hasn't become more sensible.
If they keep it high it might be because they need a large proportion of their margins to come from the current machines.
I could see either happening, but I think they're both really cheap in the UK atm anyway, going cheaper in the States would 'normalise' things in my eyes.
I can see 360 and PS3 hurting next-gen sales if they continue to sell long term... DS did the same to 3DS. It would have been a gamble on margins, but it might have been best to have cleared the stock pipeline by Summer IMO. Give consumers little choice.