
Why develop an OS, when a free one is there waiting for you to add to it.
Let's see... - on one side, you've got Apple - own OS + own hardware. On the other side, you'v got the army of "everybody else", Google's Android + own hardware. Now what possible difference could make on more addition to that Android soup ? I am glad RIM decided to forge it's own OS - that has the potential of making them a strong player in the smartphone contest. And what's event better - it's QNX based, which means - native apps, oh yeeeeaaah ! Take that, Java !
If you teach your children to like computers and to know how to gamble then they'll always be interested in something and won't come to no real harm.