Onyx devices do have selection zoom. using the stylus you drag a box over what you want zoomed and it brings it full screen and then you can pan around a bit, with the speed limitation of eink of course
Onyx is actually preparing a new devices with the multi touch infrared from neo node. its months away but here is a video of early prototype hardware showing "pinch to zoom"
http://static.youku.com/v1.0.0188/v/...U5ODUCAg%3D%3D
*that is early prototype hardware in a current A60 shell. the final device is expected to look a bit different