RIM, having built their base in the Enterprise space, is now moving "down" into the consumer space. Apple, having a built a solid base in the consumer segment with the iPhone, is now moving "up" into the Enterprise space. The key will be where the two companies intersect in their market penetration as that will become the new battleground for mindshare. It will be a two horse race (at least in North America).

Competition is great. It will bring out the best enginering and Industrial Design in both companies. The end user will be the beneficiary.