New apearences in technology and their effects on people's money

Nowadays we are a world of full consumerism.
We spend lot's of money in things that after half an year don't have the same value because another things is invented and it's better than what we have and again and again we spend money on another thing we don't need.
New technologies are always arriving and loosing their value to another other technology.
But the fact is that with all these changings our world is envolving and growing every day more and more.