Something I found interesting on today's NTSB briefing is that according to Chairman Hersman, Asiana 214 had shoulder and lap belts in business class and only lap belts in economy.
I rode OZ in business class a few months ago but it was an A330 and I don't remember a shoulder belt but I was tired, enjoying champagne, and may not have noticed.
Some high points of today's briefing here:
Asiana Flight 214: Updates From The NTSB Investigation : The Two-Way : NPR