There always will be a White MacBook IMO.
ALL the schools that use macs (At least here in the US) purchase them for laptops. If Apple were to remove the White MacBook, that would be a problem for the education market.
Plus, the White MacBook still sells pretty well, at least at my local Apple Store.
The last time I was in there, for about an hour and a half, 7 people bought white MacBooks, (But, yes, over 20 bought the 13" Pro, and about 3 bought the 15") The iPads were also disappearing as fast as they brought them out, but that's besides the point.