Computer science is the operating system for all innovation.

Any idea that turns out to be truly great can be harvested for tens of years. On the other hand, if you want to continue to be great, you've got to bet on new things, big, bold bets.

Throughout our history, Microsoft has won by making big, bold bets. I believe that now is not the time to scale back the scope of our ambition or the scale of our investment. While our opportunities are greater than ever, we also face new competitors, faster-moving markets and new customer demands.

This is a great opportunity for Don, and I wish him success. I am incredibly proud of the work and vision culminating in Xbox One. I'm particularly excited about how Xbox pushes forward our devices and services transformation by bringing together the best of Microsoft.

I love the fact that Satya Nadella's checked the checkbox for cross-platform for a number of our services. I still think it's very important to do the right kind of innovative integration across Windows and our hardware platforms with our cloud services. I think the company's doing a lot of good stuff. Real competition in AWS. Real competition in terms of the clients, particularly from a hardware perspective, there's also [competition] from Chrome. But all in all pretty good.

Ultimately progress is measured sort of through the eyes of users.

Baseball is a set of individuals doing their thing in the same team, but it's much more individual. In basketball people are making real time decisions about who gets the ball, do we trust everybody out on the court, and the analytics certainly don't show you all those subtle dynamics, but they're very important.