> If someone finds out to produce real wealth much cheaper, we'll see a major redefinition of consumer society.
Please learn basic economics.
The problem is that there's a limited amount of supply of real estate. Everyone wants real estate, so market participants bid up the price until supply and demand match.
If everyone in the world gets substantially wealthier in the next few decades, then they'll just bid higher and higher against each other for the same pool of real estate, driving up the price of real estate until enough people are priced out of the market for supply to again match demand [1].
Of course, Le Chatelier's principle [2] says that as the prices rise, changes will happen that oppose the rise in prices. For example, if you're a company in a land-intensive sector like agriculture, more expensive land means you invest more in existing equipment and techniques that can help you use your land more effectively right now, and R&D into brand new equipment and techniques that will help you use your land more effectively in the future.
Likewise, if land prices rise, prices of other goods will change to reflect the cost of land used to produce them. Because land-intensive products are more expensive in this world, people will naturally make decisions on their own to use less of them. Falling demand for land-intensive products will translate directly into reduced demand for land to produce them, opposing the rise in prices.
[1] Assuming no new supply of real estate is discovered. Of course, it's possible that new supply sources will be discovered causing a drop in prices, or blunting the impact of the forces that cause housing prices to rise. While we can rule out the discovery of a new continent as happened with the European "discovery" of North and South America, it's conceivable that within 100 years we'll have some combination of space colonies, artificial islands, multilevel cities / more high-rise construction, better technology for doing things in deserts and other presently marginal regions, underground buildings...