The best I can think of with $150 is:
-A GPU twice as strong as the Wii U.
^That's not gonna cut it unless it has some massively killer apps, and even then 30million at most. Then again maybe that's all they need.
Prediction for console Lifetime sales:
Wii:100-120 million, PS3:80-110 million, 360:70-100 million
[Prediction Made 11/5/2009]
3DS: 65m, PSV: 22m, Wii U: 18-22m, PS4: 80-120m, X1: 35-55m
I gauruntee the PS5 comes out after only 5-6 years after the launch of the PS4.
[Prediction Made 6/18/2014]