I think nearly any story based book should work when read, though of course a lot will depend on the skill of the reader. Some readers will make books come alive, others will either be flat, boring or just won't capture the story in the right way. I would also agree that some books will even benefit from it, which is not to say that they are impossible to read, but that being read aloud brings them to life in a way that reading doesn't quite capture (which is part going to come down to the readers skill and voice).
I wouldn't expect reading to vanish and would expect audio to be complimentary to written books; though we might well see the digital market adapt to a continual rise in audiobooks by making audiobooks the default purchase with a digital written version being bundled into the deal at the same time (two for one!).
I can't in any way see reading vanishing though - first up its integral to society so its unlikely to vanish; though the word structure will change over time (as it always has*). I'd also say that when it comes to books reading is likely going to remain a strong element for many. Audio books change the experience and, as said above, some books are easier to digest the story when you can pause; read back a few times; check something; take it at a slower pace etc... Also the nature of audio often being an accompanying element to life means that there's a high chance of missing larger chunks of the story as life distracts you as you do other things at the same time. With reading that can happen too, but to a lesser extend I would say (as you are more likely to only read rather than do two or three things at once)
Stephan is very right in that the internet and ebooks have thrust books out of their once very controlled past. Publishers no longer hold all the cards; self publishing is no longer the domain of the richer-unskilled writer (one could say vanity writers); market reach is now far more evenly spread (get your ebook on amazon and you've got the market).
However yes the market is very confusing right now; there are no more gatekeepers who are easy to spot, save for the traditional publishers. Say what we might a traditional publisher at least achieves a minimum standard of writing at a technical level; and a standard of product in what they sell**.
Youtubers, twitterers, good reads and more - I fully expect over the next years to come we will see a rise in reviewers and resources geared toward hunting down the quality books on the market and delivering them to the market in the form of articles; podcasts; videos etc... Indeed its already started, but I'd say its got a way to go yet.
*though one hopes that leet and texting language never becomes the standard
**although many still utterly fail to produce well transcribed ebooks - reading though several newer ebook versions of David Gemmel's work and there are a LOT of spoken parts which start without " denoting the opening of speech; its easy to spot, but it does sit there as a continual annoyance.