Aerospace engineer here and there are some real problems which this article doesn’t address.
Unless a new propulsion system is found that makes use of combined cycles (A subsonic air breather, supersonic air breather, hypersonic air breather and a hypersonic closed cycle.) that is cost effective, the British may have one with the SABER, there is no way this will be economical nor meet the noise requirements at your local airport.
And I don’t see anyone poring money into a vertical launch service at your local airport either. Are you really going to pay $200,000 for a one way ticket between New York and Tokyo?
A businessman needing to be there to sort out a problem before a billion dollar deal fails? Sure. Regular people on vacation? No.