Blodget finally came up with something that made sense. The Bloomberg video is here.
Smartphones are the new computer, and MSFT sells operating systems. Windows Mobile averages about $12 of license revenue per unit; and sells about 30 million of them, RIMM makes a few hundred plus on each phone.
What AAPL and RIMM have shown is that in this business, you need to own both the software and hardware platforms to compete.
Therefore, for MSFT to compete, it needs to own RIMM.