There's absolutely no justification to do this with computers as well.
They are not thinking rationally now. They are greedy and they think the costumers will accept anything they'll throw on them.
Uhm.... There are reasons for the price hike actual changes in technology, R&D costs recouped and internal specs bumped. Don't forget to look at windows laptops - the entire market for high-end laptops has increased their prices, BEFORE Apple did. Also, businesses don't act with human emotion. They aren't "greedy" or "irrational" with anything. They recoup losses and make profits, while providing products people will buy. If you won't buy it, they will be just fine.