Facebook offices are located in the area populated by mostly white or asian residents. If you look at census data for San Mateo county it will not be hard to see that facebook diversity number closely follow demographics of college graduates for that live in that area.
Uber is not worth $41b but it is worth $1.5b that investors put in it. VCs hold preferred shares and they will get paid first should tings turn sour. Everyone else will be holding the bag - that includes employees with stock options. Don't believe startups offering 0.00001% of $41b in stock options. Negotiate for hard cash instead.
Watson is tip of the iceberg. Computers already tell us which route to take, places to go eat, news to follow and stuff to buy. The new generations will a) accept these suggestions as blind truth; b) will not understand how these suggestions are generated. Resistance is futile.