Classic Californian ideology. Get frustrated that an existing system isn't perfect, and decide that the only solution is to build an entirely new system separated from the old one. Promise lots of nice stuff (walkable cities yay!) but you can be sure it's only going to be available to the wealthy.
How are you going to make low-density med-style homes in CALIFORNIA cheap? 0% chance that the people doing this are in favour of rent controls. Once all the houses in the walkable areas get bought by the super rich, who's going to work in the shops? Workers will get bussed in and you'll be left with another rich person enclave that happens to have a street mall that you can walk to.
Also all of their promo-images were AI generated which bodes really well.