@evildictaitor: He wasn't CEO during the BlackBerry PlayBook tablet era. The only tablets my family have used are BlackBerry, and I'm using one right now. I plug mine into a HD monitor also and read blogs and study. I'm reading Charles Petzold's Programming Windows Phone 7 book on it right now.
As for taking his advice, I'd say it's more like food for thought. I always look for flaws in advice or statements from people. And I often find them.
And yes the making of a tablet by BlackBerry was a mistake. It probably did help them flush out flaws in the new operating system that they use on both the tablet and the brand new phones.
As to his advice and my thoughts; I make software and as long as I can still sell it in 5 years, it doesn't matter what end users have in terms of hardware. I wouldn't hazard a guess as to what will be in 5 years, and fortunately I don't have to. But I'm pretty sure we'll all be running 10GHz CPU's by then.
(my spell checker broke while composing this message )