I'm on the same page as TOO. I've been using this method for many years with a budget (but high def) 42" screen and the PPS he mentions on the PC. Before that it was the same screen with pictures of the A3 briefings simply taken with a phone (all with the permission of the same well known company) The whiteboard is used to answer questions that can't be pointed to on the screen and for very short briefs!
When he or she comes to audit, I'm confident the inspector will be ok with it too (sic).