What is an unprecedented level of safety? One that will never crash? Or does it have a dozen airbags?
Every aircraft ever designed has an unprecedented level of safety, until it has its first crash, just like all the precedents.
And comfort? Reclining armchairs for the pilots? Aircon that works as well as a car's does?
Running on a variety of fuels... hmm...when they get it to run on water, then it will be one that commands attention. Should Rolls-Royce and other engine makers be worried?
Silencing usually comes with penalties in weight and in efficiency. The designs to muffle the scream of a compressor will be interesting to see, as will be the exhaust muffler which doesn't affect the back pressure on the turbine.
Hughes 500 is apparently quite excited, but if they want people to open their wallets, a bit more information is needed.