Actually BSD - the Unix clone before Linux. But close enough.

The big benefit here is that the number of people who buy Symbian/Maemo for the sake of Symbian/Maemo is probably miniscule compared to the number of people who need a new phone and think "Nokias are good, sure, I'll get one of those."

As much as we may hate the thought, Microsoft is about to leap over the others thanks to tying themselves to a high-market share company.

Nokia are a default good choice for someone who doesn't know much about phones. That will continue.