I remember a while back thinking about places for people to live, how things were designed. If you were going to have a factory, say, you need people to work in it. They need a place to live. But why is housing built the way it is? It should be inter-generational. It should be a whole community that moves in to work in your factory, not just isolated individuals. The residential structure should facilitate that, it should be designed from the ground up for that.

Other points:

We need more nature. We should be building in harmony with nature, as part of it, not on top of it. Even if we do become super-high-density, there's still opportunity to incorporate nature into that. Living walls you can pick your fresh veggies off for dinner, grown off sunlight redirected with mirrors? Incorporating nesting habitat for birds and such into the building design? There are possibilities. I'm lucky to have a yard right now and it makes me so incredibly happy just to go watch the life even in this little space. And I learn from watching and being part of it. I think it's very important.