I remember reading about and seeing a show talking about radical blended wing designs back in the 80's. They never came about as there seems to be a lot of issues with the design. Looking at the picture alone, do the passengers have windows to look out of? Do they need them? Segregation of fuel tanks from the passenger cabin? Looking at the placement of the engines, wouldn't they be blanked during an approach due to the high AoA approaches of delta wing aircraft?
Wasn't the 747-800 just another name for the 747X?
As an engineer I hope it's not a ploy, would be good to work on it.