Have recently been discussing this very subject with family members.
All the talk we hear about house prices being out of the reach of first home buyers and young couples is bought sharply into focus when you listen to the expectations of these people.
Gotta have min 4 bed rooms, 2 bathrooms/toilets, office/study and the list goes on.
Blocks are getting smaller, houses as well as builders and real estate agents wallets are getting fatter.
Mark my words, these same houses in years to come will be difficult to sell as people realise cleaning and maintaining them is an expensive time consuming business, the wheel will turn full circle and down sizing will once again be the way to go. ;)