Because one of the strengths of Google (that projects are done by discrete, disparate teams) is also its weakness (in that there's no cohesion between products

Because one of the strengths of Google (that projects are done by discrete, disparate teams) is also its weakness (in that there's no cohesion between products and projects). Thus why Google TV, Android, and the Nexus Q are all different projects that don't interoperate especially well or share a common feature set.