I saw this and it just made me laugh. It's like the Paris airshow is being used for outrageous claims this time around.
I can't see any airline buying into an aircraft that is carrying multiple engines as dead weight for various stages of flight, with only the front 1/3rd of the aircraft taking passengers? Let alone the "Coming in 2050" tagline...I would have placed this annoucement at "Comic-con"
It would be better if the next 40 years were to be used to develop a more appropriate propulsion system for the idea.
I wonder if Boeing will rehash their sonic cruiser concept...