I am an Nokia N95 user, ( so I am biased ) but I have NEVER seen the point of using a BB, I have ALWAYS got my IMAP emails in, ok most will say BB keyboard...but I honestly have not suffered W/O keyboard dont write novels on my pocket phone, I have a 3lbs Ultraportable Vaio for that.

EVERY user is sooooo different, I see people wanting to watch videos on their device I am not one of them ( YouTube OK).
and I do see a bit of difference between North American users and espicially Scandinavian ( Ericsson / Nokia Countries)
if people like BB for their needs fine for them, but I have a hard time seing BB devices ( I'm not fully up-dated) being much more than a phone with push email.
take into account that I've used 3G broadband for several years now, so that may be very different from your usage.
that is my 2 cents