It strikes me as insane when people hesitate to pay $5 for a game (likely worth $20-$30 for Mac, PC or PSP) waiting to see if it becomes $1.
That $4 you saved is a fraction of the cost of the meal you bought yesterday, maybe didn't even like, and have now forgotten.
There are reviews and screenshots--that's enough to make a few bucks an acceptable, even trivial risk for me. The higher the price, the more sure I have to be before I buy, but I certainly don't complain that the developers are making too much money!
I personally feel that it's the very success of the app store that is creating this downward pricing pressure. There are so many great apps coming out that people are pacing their spending to buy "best-in-class" software. Intua's Beatmaker, deep green chess, these serve their niches very well and should be able to maintain their prices for some time to come. There's no way you'd find this kind of quality for free.
When an app spills over the tipping point of being simply a novelty (Classics) to being truly useful and/or brilliant, people will pay, i'm sure of it.