Well, the difference is that currently you can only build reputation IN AMAZON or IN ALIBABA, we have no reliable way to objectively generate reputation in the same decentralized way that you might, for instance, have a reputation in your home town... ethereum changes that.
You could say "It doesn't matter if my reputation is dependent on Amazon's database, it still works!" and you'd have a point. This is in fact the big challenge for ethereum (and technologies like it) in that they allow small improvements in many use cases, but there's no obvious singular "deal changer", and admittedly there may never be.
You could say "It doesn't matter if my reputation is dependent on Amazon's database, it still works!" and you'd have a point. This is in fact the big challenge for ethereum (and technologies like it) in that they allow small improvements in many use cases, but there's no obvious singular "deal changer", and admittedly there may never be.