Plastic Logic QUE proReader delayed

Folks who have long been looking forward to the Plastic Logic QUE proReader that was supposed to come out sometime in the middle of next month will be disappointed since it has been delayed to an unspecified date in the summer. There were no exact reasons behind the delay, but apparently it was meant to “fine-tune the features and enhance the overall product experience.” How will this shape the battlefield of the e-reader market? Will the iPad’s head start (albeit it not being a dedicated e-reader) prove to be too monumental a task for the QUE to overtake later on?