According to Google co-founder Sergey Brin, Google may change directions and focus on a single operating system down the road rather than two. Currently the company has two independent OS projects taking at the same time. Google wanted to give the two projects freedom to evolve, so they never admitted the apparent conflict between the two projects. Currently, each OS has unique benefits, for example Android is widely adaptable to a range of devices and hardware outfits, including netbooks.
Perhaps the future convergence of the two projects speaks to a larger direction in the computing market--an inevitable convergence of the mobile phone and the workhorse computer.