MCV is reporting that Sony will show off an ebook reader at E3 for the PS3 and likely the PS Vita. So, now the Vita can Skype, do social video with Nico Nico and will soon be a document reader. Apple tried a big move on this with ebooks 2.0, packed with great levels of connectivity and interactivity, earlier in the year.
But for Sony, it is more likely to be a flatter reader offering, bringing books, PDFs and perhaps comics back to the handheld. Called "Storyteller", it'd be good if Sony does pack in interactive options, but given its feeble music service and cookie-cutter video store, its hard to see Sony doing this well.