Flying wing designs are both beautiful and efficient. They do have a narrow center of gravity envelope and less pitch and yaw stability than conventional designs. Artificial stability technology (in the form of enhanced autopilots) wasn't all that good in the late 1940s when Northrup was testing their flying wing bombers. This not only reduced flight safety but also bombing accuracy. That isn't an issue any more, as seen with the success of the B-2. Artificial stability technology is very mature today.

Whether or not it would be accepted as a passenger plane is a matter of debate. It could make for an excellent freight hauler so long as it's loaded properly. Air freight is a large and growing market.