One of the monthly columns I write is for TMC's Internet Telephony Magazine, and this one is called Rethinking Communications. With a mandate like that, my latest column fits right in - "Is Voice Really Dead?" - and is running here as part of the magazine's digital edition.
Chances are you have a pretty good idea about that already, and whatever side of the coin you're on, I think you'll find this a good read. My commentary is based largely on takeaways from the SmartVoice track during the last ITExpo in Miami, with particular reference to what Martin Geddes had to say. He's definitely on to something with hypervoice, and I would encourage to you to explore that further.