I wonder if turnover in home furnishings is accelerating in wealthy economies. The Ikea stuff usually doesn't last long. Its obsolescence is an essential part of their design and manufacturing philosophy. They know that people will come back for more flat-packed junk that can be loaded into rental vans. The urban masses need sofas, couches, end tables, and dining room sets ad infinitum.
And who will prove to have a better business model? Room & Board, Restoration Hardware, or Ikea? Whatever happens, I don't expect any revolutions in furniture design.