For part of the answer I'll defer to lemmyslander's post above. I think he gets what I'm talking about.

"Proper management" is a broad term but again, if it's examined objectively (pretend you're not a Nokia employee for a moment ) then one can start to see specific solutions. As has been mentioned numerous times and driven home by one poster very recently, consumer retention is the single biggest part of it. If a company can cultivate rabid consumer loyalty, it need not fear the negative aspects of revealing any sort of high-level hardware roadmap. As lemmy pointed out, some companies are doing it and succeeding. A general roadmap need not be a risk. I do suspect though that when one becomes so, odds are it's part of a self-fulfilling prophecy.