@Coises
Well, sometimes things have been tried earlier in a more primitive form, but their time just hadn't come yet (I believe there have been a few iPad predecessors in the past, that all came to zip, since they were too bulky, or expensive, or simply too weird).
And sometimes it's a matter of doing the same old same (think AOL and Facebook) but on a far grander scale, or more immediately interactive.
Talking about which - I think they haven't really thought the 'interactive' part thru yet - they mostly have silly ideas about advertising going interactive on your case - yeah people will line up for *that*, sure thang.
But you could do the same old same of all the stuff that *used* to work well in old-fashioned radio, and give those a new twist (interactive playlist voting, skype-ins etc).
Nothing really 'new' but old-fashioned radio would get a nice boost up the behind from doing the old things in a new way that you just *could not* have done it back in the old days.