I’m quite happy for philosophy to keep going, investigating and considering ethical questions. I think we need it; for example, the Google Car is the trolley problem.
Reading what The Science Guy and others have said about philosophy, it seems they were talking about philosophy’s contribution to discovering how the natural world works, rather than moral dilemmas. For that, it does seem that the scientific method is more successful than thinking really really hard about something and then declaring it to be true.