Tony Hayward's Congressional Grilling: Does It Mean Anything?

Tony Hayward heard it from Members of Congress this week, but to what end? He claimed that the blame was not BP's alone, but that his soon to be ex-employer will be helping to ease the pain of their many victims. Compensation and public relations have already been doled out in some fashion (though hardly enough of the former), so my question is besides good press for the Representatives who pummeled Hayward at the hearing, what good will that do? Especially in regard to preventing future spills (like this one).