Microsoft just set the stage for an all-out AI talent war with Google

• Microsoft is opening a new AI division in London, which is home to Google's DeepMind.
• The new hub sets the stage for a heated talent war between the two companies.
• Google has been trying to stop bleeding talent. It may now have to try harder.

Microsoft is opening a new artificial-intelligence unit in London, putting itself firmly on the turf of its biggest AI rival: Google DeepMind.