The nearer High Frontier (was The ability to build new land)

--- In spacesettlers@yahoogroups.com, Joe Strout wrote:
> On 8/12/12 1:54 AM, hitssquad wrote:
> > Why not build new land on Earth?
> because on Earth, all the places you might build new land are already in use.

Up in the air?

> even if you turn Earth into an Ecumenopolis, it still will be a paltry amount of living space compared to what's available in the rest of the solar system

Building new living space in free space is essentially the same as building new living space on Earth -- you're building new stories, higher. How is this not a High Frontier?:
http://google.com/search?q=one+world+trade+center+freedom&tbm=isch

How is this not simply another upper story?:
http://www.google.com/search?q=Island+Three&tbm=isch

How is a 100 story building not 99 stories of new land?