Surface radar wouldn't have helped in this case. The aircraft started its takeoff roll at the right point - runway 32 at Kilo taxiway. Controllers (rightly) wouldn't say anything after observing the wrong takeoff direction on radar, for the same reasons the controllers in the tower cab didn't. V1 was probably somewhere around 50 knots!
The fascinating thing about this incident is that taxiway Kilo narrows down significantly after passing the threshhold of 06L. I would estimate 40 foot width or less. These guys could track a centerline, at least.....