This is similar to complaining we don't have 10ghz processors. Yes this is true, but as it turns out thats a hard problem and we can work around it elsewhere.
Hypersonic presents a completely different set of problems in things like materials, design, shockwave management, etc.... That and it likely isn't profitable. Better to design fuel efficient jets that fly closer to the speed of sound than another concorde.
Range keeps going up. Now you can fly a big airliner between pretty much any two large airports on the planet, if you can sell the tickets for that route. The trip takes a max of, what, 20 hours or so? Cutting that down to, say, 6 hours just doesn't win you that much. Sure, there are some people who would really benefit, but I'd wager that the vast majority of travelers either get almost as much benefit from the 20-hour trip as they would from the 6-hour trip, and the vast majority of people for whom the 20-hour trip is too long to be useful would also find the 6-hour trip to be too long to be useful.
The world is only so big, and at some point, making the stuff go faster doesn't get you all that much. Personally, if I magically had the choice, I'd much rather fly on an airliner that traveled at current speeds but was more comfortable and didn't have security nonsense surrounding it than on a hypersonic airliner with the same ergonomics and security nonsense we have right now.
Two hour flights are no problem, the five hours cross-country is ok, but any long haul in coach is pretty miserable.
Very important point. Airtravel after 9/11 took a huge step back for the sake of security theater. Used to be, I could get to airport 30m before flight time, and the terminal 10m before takeoff on a relatively light day and have no problem making the flight (I had done this repeatedly). Add ~30m to get to the airport and you're looking at 1hr each way for +2 hrs door-to-door (on average, YMMV).
Now, those times are doubled to tripled, with the added treacherous possibility of missing the flight completely if you happen to get randomly flagged or say or do the wrong thing during security (all with the bonus of either being groped or irradiated).
So that 20hrs becomes 26+ and 6 becomes 12+. Now you've lost a day, either way.
The whole fly-by-wire / auto land thing which would make a remake of "Airport" much less of a thriller. Its taken a long time to get these systems certified but they have changed the way these planes are managed.
There has been a lot of change in entertainment and communication options, from a single four channel radio phone of the 90's we've now got multichannel live satellite feeds and internet access. Per seat entertainment choices vs one VHS tape for everyone.
Speed and range gains have also made it possible for smaller airports to support non-stop flights to distant destinations. While people near SFO or NYC may not see a change, the fact that you could fly from Reno to Tokyo non-stop is a big change.
Finally you have to realize that a plane is a 20 year investment by an airline so you'll see changes on the order of 10 years not every year.
The 787 is a pretty amazing piece of gear, full up replacement planes are a slow process.
low ticket prices == cram as many cattle that be legally packed into the fuselage, close the door, and go
So all the cool features Boeing cares to demonstrate on this plane will not be ordered by any major airline aside from Emirates, all the major US carriers will be choosing the standard plastic window shade instead.