Obviously RIM is still marketing towards their core customers - businesses - and their new customers, consumers. Not to Mac users, and not to Linux guys. What percentage of desktops use Windows (calling it Windoze and Micro$oft is sooo old) compared to Linux? The stories of companies and governments moving to Linux are legendary. And very, very few.
I know people love Linux. And Betamax was better than VHS for years, right?
Linux has a future - but today it is still a niche and could remain that way for several years.
And once Linux meets some critical mass, the viruses and spyware will start. Open Source does not mean free OR secure. Remember there were no Mac viruses either....