Price is too high, features too few, distinct advantages under compelling, and ergonomics too nomic ... until they aren't.
In other words, its a big change of form and function, not to mention the physics tradeoffs of these products, so it makes sense that the right combo is taking a while to fall into place.
If Apple customers, who have the shiny shells to shell out, fall in love with their devices, that will mean a lot.
