End Busing?

An op-ed in today's Globe argues that busing should be discontinued in Boston for financial, environmental and practical reasons. Good points, all. I wonder, though. If busing were stopped completely, would schools like the Lyndon (52% white) or Kilmer (62% white), have any children of color?

N.B. I don't know how busing works for schools like this, but it seems likely that primarily white, higher performing schools in primarily white neighborhoods like West Roxbury would just get whiter, right?

Update:
Vaznis has a piece in the Globe today about the high cost and inefficiencies of busing in the Hub.