Apparently, the iPad lacks good typography. This is very distressing, since one of the things I imagine using the iPad for is reading electronic books.
These decisions were small or unnoticeable to the millions of future iPad buyers watching the announcement. But they stuck out like a sore thumb to typographers, whose job it is to make small, unnoticeable decisions that make text easier and more enjoyable to read.
This is exactly what good typography should be. Like editing in a film, when it's good you don't notice it but when it's bad it completely disrupts the experience.