The biggest problem with modern intelligent phones, specially apple ones, is that there is zero tactile feedback on the screen vs good old buttons or keyboard.
The biggest problem with modern intelligent phones, specially apple ones, is that there is zero tactile feedback on the screen vs good old buttons or keyboard.
For an much more in-depth and eloquent discussion of touch screens and accessibility, you should check out this paper, slide rule which is the research that the VoiceOver design is based on.
http://openexhibits.org/paper/slide-rule-making-mobile-touch...
This is one of the few places where I give iDevices a lot of credit. Apple knew that touchscreens have certain disadvantages in that regard, and put a lot of thought into features that overcome those disadvantages. The result is something that's in many ways more usable for a blind person than a full-sized computer.
Source: A family member volunteered to help blind students for a while.