OK, I've been staring quite hard into my crystal ball since more recent rumours started flying, and it appears I got it wrong, and so did my informant. For the forseeable future it appears there will not be a 'one size fits all' shark fin antenna.
I've found out quite a lot more recently though, and will be publishing some other forecasts soon, in addition to those here:
http://www.mini2.com/news/news186.html