Change of suburban in 21st century

“As urbanization, rural areas are decreaseing, the marjority of Americans are living in suburban.
The function of suburban is changing in 21st century. In the past, suburban are for factory, parks.But in 21th century, suburbia are connecting with urban and urban economy.
Suburbs are alive and well in 21st century, there are full of diversity of forms in suburbs, structures and populations.” these are my thoughts, you can change if you want.
You should pick one city to analyze and discuss.