In many countries this is the norm for property "ownership". You never own the land and all improvements revert the the owner/ descendants after the end of the lease or how ever the lease is worded. These long term leases can be sold about like we sale in Fee Simple but obviously have the lease terms. Sales, therefore are often of diminishing value as the end of the lease nears.
Many Hwy intersection and other commercial properties are actually long term leases more often 25 to 30 years in the US.
Problem in the US is that the cost for a 99 year lease is about the same as a similar fee simple out right purchase and unless some unique factors are in play, including tax issues and location, few traditional buyers will have interest.
I think you will see this grow in larger cities or areas where the uniqueness of the land can out way other factors.
For example in Switzerland it is very common even for individual homes and small farms to be on 99 year leases. This also allows non-Swiss people to "own" property even in Cantons that prohibit foreign ownership of land.