Apple has again expanded the functions of iTunes Preview, the web-based showcase for material at the iTunes Store.
In addition to music, site visitors can now see previews of iPhone apps; when opening an app link in a web browser, people will see details and screenshots without having to own iTunes. Actually downloading an app requires following a link back to iTunes.

In early January, Apple added sound samples to Preview music listings.
There has been a lot of speculation as to what Apple’s rumored tablet will look like and how it will work. One analyst is now speculating on how much potential revenue the device, expected to be announced next week, could bring the Mac maker.
Mike Abramsky of RBC Capital estimates that Apple will sell each tablet for $600, according to an AppleInsider report. At that price, the “base case” scenario of 5 billion units sold during the first year would bring Apple an additional $2.8 billion in revenue.
Of course, we all know how important price is these days, when launching a new product, so Abramsky gave a couple of other scenarios to consider. If Apple sells the tablet for $800, Apple would see $777 million in revenue for the sale of 1 million units.
You can see the trend here–as the price goes up, the predicted number of units sold goes down.
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