They’re definitely trying to use land more efficiently than normal suburbia. There’s lots of townhomes and apartments there. There’s not always huge amounts of separation between differing land usage; it is possible to easily walk from some of the housing to some of the shops. A big chunk of the land was set aside as a wildland park (which was the main reason I was there, to go for a midwinter hike).
Particularly at its current stage, it’s still very much auto-oriented suburbia. It has its own freeway exit, and is served by a feeder road far wider than one would have in an older, traditional city for an equivalent-sized neighborhood. While there’s plans to build enough shops to make it self-sufficient, it’s not there yet: for example, there’s still no grocery store at all there; you must drive several miles to the nearest one. There’s big gaps in the still-incomplete development that beg to be driven across. Most of the housing is not at this time a convenient walk to shopping. Transit service, at this stage, is minimal.
It shows the limitations of capitalism. If you’re not affluent, all you can afford there is a condo or a townhome. If you’re well off, there’s detached homes (with views) available. There’s very large homes on large lots if you’re really rolling in the dough-re-mi. In other words, it’s not really repudiating the wasteful American lifestyle: it’s merely pricing the non-rich out of some aspects of it, turning it into more of an elite privilege than it presently is. (Which it definitely is, when you look at things on a world-wide scale.)