"contemporary cognitive science needs to be part of any serious conversation about attention and imagination."

Get me and Marc started on this sometime. We will make a grown man cry.

Actually, you have probably heard Marc's take on this. Mine boils down to the following: "When you read something it freakin' CHANGES YOUR BRAIN, physically, and why does everybody not therefore think this that the brain is the A #1 most important thing for us to pay attention to if we're going to talk about text or literature WHY WHY WHY?"

Here's another well-known American novelist doing e-lit - http://ninthletter.art.uiuc.edu/FA/FA05/ - unfortunately it's rather banal.

One might even argue that games are in and of themselves paragone battlegrounds:
http://misc.wordherders.net/archives/002578.html#6672

The conflict of image, text, and sound contributes to the difficulty in developing an effective taxonomy for games (a genre question as much as anything, perhaps), but also might explain their appeal.

Add, of course, that elusive new art: Interactivity (or Immersion, or Configuration, or Agency, or ...).